[Shifty Geezer]

I was of the impression that ALL rendering is 720p and output is managed by the scaling chip. Therefore SDTV gamers will get 720p downsampled = better AA. But there won't be any framerate changes or the like because the game is still rendering a 720p buffer. This is probably a good thing. A console that has different rendering speeds at different resolutions is going to be confusing/annoying to Joe Public, and makes development more complicated. Better for devs to target 30/60 fps at 720p without trying to improve things for lower res's, and just accept SDTV uses gain an IQ boost at the lower res.