It might not mean that much, but considering that Microsoft doesn't have nearly as many exclusives as PS3, I think it matters as much as PS3 games switching to 360. GTA was obviously the biggest news so far considering how well it sells, but the few 360 exclusives are very important for microsoft, so any they lose is important. That said, I'm not holding out hope I won't have to get a 360 at some point to play any of those games.