@ Squilliam
Yes the EDRam bandwidth is useful for mainly AA, however there are enough 360 games lacking AA. Including some of its best games like Kameo, Halo 3, Dead Space, Madden 09, Quake 4, etc. The problem is that the amount of EDRam is so small and tiling results in framerate issues.
You can't come to the conclusion Motorstorm 2 can be done on the 360 with AA nor without any other sacrifices, for example regarding physics, lossless 7.1 audio, the amount of online multi-players supported, etc. Having AA or not is often a lesser factor regarding high definition game design and the Cell can even do a lot of stuff regarding potential aliasing issues as well, just look at Killzone 2 and things will even improve a lot along the road with regard to what developers will be able to achieve down the road smartly utilizing the Cell's potential.