I'm not a gamer, but my 14-year-old son is deeeeeeep into his PS3. So deep that we have to limit his time to keep him from sinking in! I watch over his shoulder a lot, and the graphics are pretty stunning. He is a RPG gamer -- the Batman series, the Assasin's Creed Series, Infamous, Skyrim...and from my point of view (again...over his shoulder) the best are the ones that look as if you've walked into a great comic book or graphic novel. I'm particularly a fan of the look of the Batman Arkam Asylum/Arkam City games. For my own part, the only one I ever got into was Gran Turismo, an incredible car racing simulation. Great stuff. I also think the iPad is very rapidly developing into a great gaming platform, though it lends itself to different kinds of games with it's very different interface.
Tim
Tim