3 here.
Being serious. When Microsoft announced Vista they had all these new technologies which would have been actually awesome and innovative. Avalon, a new fast, lightweight replacement for DCOM. WinFS, a meta-filesystem which could have been faster than XFS for large files and ReiserFS for small files. SuperCache, which would have cut application loading times by nearly half. DX10, which was supposed to be released with Vista having brand new, light-weight technologies and stripped down for raw performance.
All drawn up in whitepapers.
All scrapped as of Q3 2005.
Now all they've done is apparently fuck around with the SMB protocol, add a new hack to replace UPnP, replace GDI+ with some DX9 wrapper, and ripped off every damn section of Apple's iLife suite, Apple's Spotlight and usability improvements found in most recently Linux distributions.
It's WinXP SP3, not a new operating system.