A feature I'd love to see on the 978 is virtual inputs. By virtual inputs I mean a system where during setup the input is first named by the user, then multiple properties assigned to it such as:
-number of active speakers
-crossover points per speaker
-individual speaker levels
-default surround mode
-apply video processing
-apply eq (including different types of eq: "flat", "normal", etc.)
-physical input (aka "connector" for purposes of this post). Important: one connector can be assigned -to multiple virtual inputs.
-physical output connectors (audio and video)

I've only owned one AV component that had this feature(Theta Casablanca prepro-sold long ago), and I miss it (feature) to this day. Let me provide a few examples of why virtual inputs would be useful.

If you have a single source (ie: HTPC) capable of serving multiple media types like audio and video, you would likely want different combinations of speakers and processing optimized for said media. For example, if you're listing to music you may only want two speakers (plus possibly a sub if they are bandwidth limited). For surround encoded movies you would probably want not only to add center and surround speakers, but a sub and auto-detect of movie surround mode. You may also want to tweak the sub level a bit versus what you used on music. Virtual inputs allow the user to configure all of this during initial setup.

Another example would be music playback. Though I often listen in stereo only, there are times that I prefer applying a music surround mode like DPLII music (live recordings). Virtual inputs make this easy while only using one physical connector (hdmi, coax, etc.) from a single source, and I did precisely this with the Casablanca prepro. Once configured all I had to do is select "stereo music" or "sur music" on my smart remote and two things would occur: Either engage 2 or 4 speakers and use stereo or matrix surround (Theta's ambiance extraction mode-very effective) as appropriate. Note that this could be applied on the fly while listening to music and as a result sold a couple of Casablancas for my dealer to friends who heard it. By the way, if you're wondering why I only used 4 speakers for music surround, this speaks to another advantage of virtual inputs. By default, Theta's matrix surround mode uses five speakers (plus sub if desired). However, in practice I found the center channel sound distracting for music so I disabled it for the surround input.

One more example involves subwoofers. With virtual inputs it would be very simple to preset subwoofer level, crossover, and even on/off per user-defined activity. So for music only, if you had a speaker that delivered very accurate bass down to say, 40hz, you could set up a "jazz/pop" virtual input that didn't use a sub. For large scale orchestral music, you could define a "classical" input that activates the sub and crosses it over at 40hz. You could set another one for rock that kick's the sub in at 60hz with as much or little bass boost as desired.

Note that though I used an HTPC as a multi-source example, virtual inputs would also be useful for CD/DVD/Blu-ray megachangers and even single disc players with Internet/remote media capabilities (Netflix, Youtube, etc.).

I know that some receivers and prepros ALMOST do this today. I know from first hand experience that at least mid to high end Onkyo and Denon components have a "personal memory plus" feature that can memorize different speaker levels and default surround modes per input. Some Denon models also have a "quick select" feature that I believe can mimic virtual input functionally. However, my Denon prepro (AVP-A1) only has three quick select inputs, and accessing them from the remote is less than intuitive.

Virtual inputs offer three other benefits:
-For novice users, they make the prepro very user-friendly. Once virtual inputs are bound to a smart remote like a Harmony, selecting a activity automatically also optimizes the prepro for said activity without user intervention.
-For Outlaw, virtual inputs could also make life easier for prepro design, as fewer physical inputs (connectors for purposes of this post) should be required, because a single connector can support multiple audio/video activities.
-For universal remote makers and users (especially Logitech Harmony), virtual inputs make set up a bit easier because for prepro configuration, beyond power on/off you would only have to know which virtual input relates to a given activity, as opposed to knowing all physical connectors involved.

The key to virtual inputs are two elements: inputs (discrete push buttons on the front of the prepro and remote), and connectors (physical inputs and outputs mainly on the rear of the prepro). On current receivers and prepros, connectors are typically labeled hdmi1, hdmi2, coax1, coax2, etc.). For virtual inputs to work all inputs and connectors must be pre-labeled by the manufacturer, and name of each label must be unique. This already occurs for all receivers and prepros I've encountered, but I would recommend one change for the a virtual input 978: Simply number the inputs sequentially from 1 to <highest numbered input offered by manufacturer>. Most manufacturers currently pre-label inputs by predicted function "TV, Music, Game", etc. and if the unit doesn't support virtual inputs, this method makes sense. However, for virtual inputs it's understood that the user will custom name the inputs during initial set up based on activity or function.

Virtual input downsides: I can think of a few.
-A bit more work will be required up front because several elements per input will have to be manually configured. However, if Outlaw were to use the "Copy Template" feature the Casablanca has, the input configuration effort would decrease significantly. With copy template, you only configure one input completely, then copy it to other ones you intend to use then tweak them as appropriate. Using this method I was able to configure six inputs for the Casablanca in ~ 20 minutes.
-Virtual inputs by definition practically require use of a learning remote that allows custom labeling of input buttons. The good news however is that you don't have to spend big money to get this kind of remote currently. Of course, Outlaw could provide such a remote if desired, but frankly I like Theta's approach with the Casablanca where they only provide a very inexpensive, basic, non-universal remote designed to only setup and operate the prepro itself. Theta (correctly IMO) concluded that owners of a prepro with Casablanca pricing would want to use their own smart remote to control the unit and system.
-Virtual inputs will likely cost a bit more (but I don't think much more) for some extra non-volatile memory to store multiple virtual input configurations.
-If you have a separate source component for each audio/video function you use, virtual inputs become less valuable (assuming Outlaw includes an equivalent version of personal memory plus per physical connection). However, even these users could still benefit from custom crossovers and speaker selection per input.

I apologize for the verbose post. I just think virtual inputs would be a very useful feature for any future Outlaw prepro.