[quote name='Kaijufan']Anti-aliasing basically makes the jaggies in games smooth. I'm pretty sure all Xbox 360 games are required to have 4xaa implemented, since it doesn't have an impact on GPU performance due to the GPU having a small amount of embedded RAM.[/QUOTE]
That's what the 10MB of EDRAM was. To have 4XAA on all games with no sacrafice of GPU processing resources.