I'm not sure what FPS's are due out on the 360 that aren't going cross platform at this point tho......I mean, Gears 2 isn't a FPS....but Killzone2 is, and its a PS3 exclusive. Of course KZ2 probably wont be out until at LEAST this time NEXT year so...who wants to give up a year of their life waiting for one game that may wind up being mediocre....
Having said that, my PS3 is a blu ray player.....the three games I own for the system sit dusty and unused, meanwhile I have a stack of well-played 360 games...so i can understand your frustration.