I would probably buy this, especially if they did what they did with Portal 2 and the PS3, where if you bought it for either the console or PC, you would get both versions
obviously that would mean games being downloaded for this console, instead of on a disc
Obviously they wouldn't be able to develop everything cross-platform, and that's something that will break this stuff.
any singleplayer games could have the saves on both using the cloud thing they have