Are you forgetting that most people who want Gears of War 2 have already bought a 360 for it? Are you forgetting that the PS3 has some excellent shooters coming up? Are you forgetting that those hardcore GTA fans have already bought GTA IV?
Give me a break. The 360 is great, but it can't beat the PS3 even when it has excellent games, better online and better price. Look at last year's WW holiday season.