XP --> Vista --> Vienna ?

Windows Vista may well be on its way out. Reports from PCWorld suggest that Vista's successor, Vienna, is due in 2009 (just two years from now!). Actually, Vista was expected to release by 2003, but that didn’t happen. Microsoft was forced to put more work on developing Windows XP SP2 rather than giving time to Vista. Finally, Vista ended up losing features like WinFS, native HD DVD, FireWire-B support, enhanced speech recognition and PC-to-PC sync. Vienna will hae it all and it might just include a brand new file system and a new user interface which eliminates start menu and toolbars.

I believe the probability of Vienna releasing in '09 is very low. If it is really true, then upgrading to Vista doesn’t make any sense to me.