You also have to realize that 7 is not set to be an evolutionary jump for Windows. As MS puts it, it is supposed to be Vista with the added features promised in Vista (and maybe a few others). So while Vista was supposed to be a jump this one is mostly to correct Vista's mistakes, so it's timeline will be understandably shorter. Besides, I don't think people are going to stand for MS continuing it's 6-7 year wait for the next OS just to get failed promises and junk.