take easy man, its just an example of ps3 exclusives
because most of the systems now are equal in everything except for exclusives
so its really you want 360 exclusives or ps3 exclusives
games mentioned are just examples but its because they are the most famous and most sought after games.
It doesn't matter if they are out or not(unless you want to play NOW and then selling your 360 ,add money, to get ps3 when games finally released) you basically buy the console and on an expectation of certain games to come out. Those who bought it at launch didn't have much games but bought on expectation that MGS , LittleBIgPlanet, Tekken and more to come in the future.
You can pick any exclusive ps3 games, not only the ones I menionted.