I don't know if I would call DVI an old standard just yet. DVI has a large existing installed base (it showed up on HDTV's at least a year or more ahead of HDMI and was included on a
lot of sets during that time - and it is still showing up on new sets). Also, at the time the 1070's feature set was being pinned down (which would likely have been 1 1/2 or 2 years ago) HDMI was an emerging and largely unsupported standard that would have been risky to pursue. All of those existing DVI-equipped TV's can be connected to HDMI-equipped source components (at least for the video portion of the signal), at which point the 1070's DVI switching becomes ideal for people with DVI or HDMI cable/satellite receivers and upsampling DVD players and DVI displays. I suspect that there will be a lot of people with DVI inputs on their TV's who will be thrilled to have the 1070's DVI switching.
As for the 1070's trigger outputs, all I've seen on that topic is the pictures from last year's HE show. For what it's worth,
this picture suggests a single trigger output.