even the low resolutions on that list are still beyond the previous-gen consoles, though. If by lowering the res. a bit they can output nicer graphics, I'm all for it; up until this generation consoles have always had sifnificantly lower resolutions than a PC and no-one ever had a problem with it, except for those 2D fighting games starting to look a little weird with the old sprites on new backgrounds.
At least in the case of the 360 it means one could settle for a HD Ready TV instead of a full HD one, which is easier in the wallet.