This has been bugging me for awhile, and maybe some of you with an Xbox and a widescreen HDTV can help me out here.
The Xbox is running on PC hardware, with what is essentially a geforce3 inside it, right? And since it is outputting to standard televisions, I expect the resolution is probably set to 640x480 (or something close) normally. Now, if you set the xbox two widescreen, then the resolution jumps to 720x480, and if you have an hdtv, then the resolution jumps again to 1024x640 (or some such number).
So, if there are xbox games that support HDTV and widescreen, then does the performance of the game take a hit? if I'm playing Rallisport Challenge on a 16x9 widescreen tv, does the normally buttery 60fps drop to 30fps when there is a lot onscreen? It seems to make sense that it will happen, but nobody has yet addressed this issue.