It's a beautiful game, made even more beautifuler on a super duper hi-rez screen. Not sure what you're tring to accomplish, Captain Buzzkill.
I'm just saying the game is note native 2880x1800.
Anyway the Rayman in PS3 and 360 are 1080p@60 fps too (the native output... the game is rendered in 1090p on PS3 and 540p on 360 but the final native output is 1080p for both... I can explain the techniques if you want).
The Rayman series have the trademard "double-speed at half-speed" and that's make all games to be 60fps (it's rendered at 120fps but downsampled to 60fps).