Do people not understand that the PS3 is not as powerful as the 360 in terms of graphics, shader structure, memory allocation and architecture, and utilization of processing power?
for info on PS3 vs Xbox 360 go to these links
http://www.hardcoreware.net/playstation-3-vs-xbox-360-one-year-later/
http://www.gamespot.com/features/6125087/index.html?type=tech
http://xbox360.ign.com/articles/617/617951p1.html
The PS3's max will probably be KillZone 2 or MGS 4.
The Wii's max -- who the hell knows?
The 360's max -- GoW 2 will hold that title