I still stand by my prediction, which is that sales of the game will decide on exclusivity. Even with the exclusivity agreement, doing a special edition on the 360 would be done to recoup costs in the event that sales are not sufficient on the PS3.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs