That's according to Mister Gates himself, who says the next incarnation of the OS will be so vastly different, users may not like it right off the bat.
Despite the tight security, rumors have been circulating as to some of the differences. Some early versions "leaked out" onto the internet, which included major changes to the graphical user interface and either a new file system or an updated to the existing one.
With previous promises coming from Microsoft that Longhorn would be available to the public in 2005, I think the really shock would be if they actually delivered. Now THAT would be scary.
Have a great weekend folks!