Is Gears of War even possible on PS3? I know it's just an UE3 game, but they said that the 360 had 512mb of RAM specifically because of this game. I don't know how much is used for the gpu/cpu split in the 360, but the 360 also has that 10mb of EDRAM for the GPU. With the PS3 having a dedicated 256mb for CPU and 256mb for GPU, I wonder if Gears is even possible on that set limit.
Sure, it probably is, if they reworked it enough. But at the end of the day, there's no need to. Why waste more time and money when you are making plenty with a single platform and still have more free time for other projects this way?