QUOTE(MadPerry)
there are already clear examples on current xbox titles with both widescreen and 4:3. halo 2 and pgr2 come to mind as to what you can expect.
yes but those games are coded for widescreen by the devs, if the console will simply chops it into 4:3 it wont work because valuable info (HUD's, health, etc.)will be lost.