Gears - have it on PC. Fun but Paris Hilton shallow. 1 play through type game.
Gears 2 - I wait for the PC release in a year.
Mass Effect - Have it on PC. I'm stuck in the citadel. It's BORING as hell so far.
Ace Combat 6 - who cares?
Bioshock - I'd pick it up for the PS3 in a couple of weeks if I hadn't already bought it on the PC a year ago.
Halo 3 - Already discussed, and I guarantee it'll be on PC eventually
Halo Wars - Halo sucks, who cares, and it'll be on PC
GTA 4 exclusive content. You're still playing GTA4? Quit living in the past :)
Not an impressive list, imo. And if that's all there is I'd say the games argument is nonexistant. I guess I should be glad you didn't bring up the juggernaut that is Too Human. How am I living without that epic gaming experience?