We'll know more once folks start using the 990, of course - including if certain brands of adapters cause problems, although the only problem I would anticipate would be with bad adapters (which would also create problems in a straight connection between DVI and HDMI). I haven't heard of any such "problem child" adapters on the market, but that doesn't mean they aren't out there. Plus, the arrival of the 990 certainly does not somehow magically flip a switch that makes 950's obsolete. Waiting a couple months to decide whether or not to upgrade won't cause your 950 to spontaneously combust in the equipment rack in protest, after all...

I think it goes without saying that you won't get OSD on the DVI output - the switching appears to be equivalent to the 950's component switching, with nothing done to the video signal except switching between two inputs.