They do look stunning for the platform the games are made for, and those higher resolutions don't really mean anything when you're doing your gaming on a TV anyway.
Err, have you tried it yourself? I pipe out my PC to my HDTV and sit about 8 feet away but it still makes a bloody massive difference in terms of quality. I'm not talking about small subtle confirmation bias type difference, I mean its a whole other level. Just the AA alone is a godsend, it's part of the reason I went with this whole setup in the first place.