I would think that xbox 2 HD would have faster and more memory and a faster gpu in order to make it capable of HD resolutions in games, while the standard xbox 2 will only do 480i and 480p. PC owuld probably have the specs of xbox 2 hd but with an operating system...but how the heck do they plan to run pc software? Is IBM going to make an x86 compatible cpu?(like itanium maybe?) I could see an entirely new OS to replace the normal windows pc, but couldn't that just drive pc makers to switch to linux or something, perhaps with windows emulation for old windows apps.(as the hardware becomes more powerful)