I think you may be mixing things up a little. Sony doesn't have exclusivity on "great games", however it's by far the most powerful platform, meaning eventually you will see complex games which simply cannot be done with identical quality on neither Wii nor XBox 360.
Lair seems pretty unique though, if you are interested in such a game PS3 lair is currently the only option. Even the most resembling games like Eragon (PS2) and Warhawk (PS3) are very different if compared to the gaming experience Lair provides. I wouldn't be surprised quite a few people will love the experience, likewise playing Madded, Tiger Woods, Gears of War, Brain Training, Super Ruba-Dub, etc isn't everyone's piece of cake while others would love it. My girlfriend for example dislikes all FPS games, but Lair looks far more interesting to her (But Warhawk isn't her type of game).