Haze is coming out on the 360 as well early next year, and by the time I've played all the other games I want this year (Mass Effect, Bioshock, Blue Dragon, Halo 3, Assassins Creed, Guitar Hero 3, Rock Band, COD4, and all the Wii Games I want) it will probably be out too!
I realize this is all personal opinion about what games certain people like but I reckon that on average, most people would find more games they want to play on the 360 this year than PS3. It's more than likely however that next Christmas there'll be a ton of PS3 games I want and hardly any 360 games, so then I'll pick up the PS3.