Paul Thurrott has a new review on where Windows Vista fails:
Let those words hang in your mind for a bit. Two and a half years later, Microsoft has yet to ship Windows Vista, and it won't actually ship this system in volume until 2007. Since the euphoria of PDC 2003, Microsoft's handling of Windows Vista has been abysmal. Promises have been made and dismissed, again and again. Features have come and gone. Heck, the entire project was literally restarted from scratch after it became obvious that the initial code base was a teetering, technological house of cards. Windows Vista, in other words, has been an utter disaster. And it's not even out yet. What the heck went wrong?