Engie:

One addition that you already refer to. While HDMI does have a theoretical advantage in being able to accomodate video beyond the 8-bit limitation of DVI, form a practical basis, that doesn't mean anything since there is nothing in the works to deliver 10-bit, let alone 12-bit, video. Not now, not soon, not likely for a long, long time. It's not just in the display at the sink end, but all the way through the content creation and distribution chain; nothing there is going to be all 10 or 12 bit end-to-end for the foreseeable future.

Yes, we all agree that one-cable would be nice, but running one cable each for audio and video from source to processor, and then one cable only (DVI or HDMI, your choice) from processor to display is just fine with me for now.