Originally, prerelease of this generation, it sounded like SD user would get the same 720p output downscaled, providing supersampled AA for extra IQ. Sadly this hasn't happened. I'm pretty sure the Xenos downscaling doesn't downsample 720p for SD users, because we had early games where the SD output was without any extra AA in effect. SDTVs would benefit most from higher IQ to offset the lower resolution, although a faster, stable framerate would be nice too. It'll be interested what Alan Wake does, whether they downscale the upscaled 720p or resample the 540p FB to a TV resolution. There's no investigation into SD output by the world's pixel-counters, which perhaps there should be now we know such a large percentage of gamers are still on it. How much of a good/raw deal are they getting?