Since all the ruckus about Nintendo not supporting HD, I felt these comments from MS, when asked what resolution PGR3 was rendering at, poignant...
http://www.eurogamer.net/article.php?article_id=61708
This both supports the view that PGR3 isn't rendering at 720p, and the view it doesn't matter. As long as games look good who cares about the resolution etc (except geeks on a 3D forum discussing tech, but who don't care about the numbers when actually playing games instead of analysing them)!
From this article about PGR3's framebuffer, as mentioned already in the gaming forum."What is going on behind the scenes in the code or the HW to get the incredible visuals for Xbox 360 is not what gamers care about.
"They just care about playing great looking and innovative games, and that is exactly what Xbox 360 and the launch lineup has provided."
http://www.eurogamer.net/article.php?article_id=61708
This both supports the view that PGR3 isn't rendering at 720p, and the view it doesn't matter. As long as games look good who cares about the resolution etc (except geeks on a 3D forum discussing tech, but who don't care about the numbers when actually playing games instead of analysing them)!