Well, if it is about the games, and xbox360 does not have those games a person waiting for PS3 wants, there's little to do other than bring those games to xbox360.
A GOW might just not be something everybody wants or should want, while good looking and technically competent, in the eyes of many it might still be just another space marine shooter.
Halo3 is just another space marine shooter.
Forza 2 is just another driving game
etc... they're all among the best of their genres, but they aren't something you won't be getting a comparable enough experience on the successor of the console you played with last gen, and of which games you enjoyed and learned to rely there'll be plenty to choose from in the games catalog.
A GOW might just not be something everybody wants or should want, while good looking and technically competent, in the eyes of many it might still be just another space marine shooter.
Halo3 is just another space marine shooter.
Forza 2 is just another driving game
etc... they're all among the best of their genres, but they aren't something you won't be getting a comparable enough experience on the successor of the console you played with last gen, and of which games you enjoyed and learned to rely there'll be plenty to choose from in the games catalog.