Yeah, that's a great question, because unlike M$, their Japanese counterparts, Sony and Nintendo ENCOURAGE backwards compatibility. Sony said that they'd allow for PS1 and PS2 games to be played, and then Nintendo's gonna allow for GameCube discs and controllers to be hooked into the Wii, and Nintendo also has it that you can play your GBA games on the DS and DS Lite, so why doesn't Microsoft follow suit? At least the Japanese aren't as greedy...