It looks like a port of Rollercoaser Tycoon 3 to the consoles than an original game (as original as rollercoaster games can get). I like these games, but I'll stick to the PC version rather than buy the same thing for the PS2.
I am a huge tycoon fan, but unfortunately I don't have an x-box, and for some reason I thought this game was for the PSP and not the x-box. But anyway, I am not very thrilled about this game. The graphics seem kind of blocky and based on the trailer, the scenario doesn't appear very realistic, even for a tycoon simulator.