Longhorn
Was Microsoft's DRM/trusted computing platform, that became Vista.
Which tried to do trusted computing, but without some of the necessary
hardware fortification - against the user. Hence all the horrible Vista
issues of media stream quality degradation to certain 'untrusted' I/O
devices.

http://www.microsoft-watch.com/article2/0,4248,1332766,00.asp
Longhorn/Palladium release in 2006 (or later)

20020725
http://www.winsupersite.com/faq/longhorn.asp
Windows "Longhorn" FAQ 
 There is an updated FAQ on what is in the next generation release of Windows will be. (After Service Pack 1 and possibly Windows XP SE). It was recently pushed back to sometime in 2004 from sometime in 2003. But after reading through it it looks quite promising. 
Once envisioned as a minor upgrade to Windows XP, Windows "Longhorn" took on all-new importance in early 2002 when Microsoft decided to reach for the brass ring and make the new Windows release an all-encompassing major upgrade with a new security architecture called Palladium, a 3D-enabled user interface, and brand-new, database-based file system, and many more exciting new features

http://www.windowsitpro.com/article/windows-server-2003/microsoft-longhorn-on-the-desktop-blackcomb-on-the-server-27266


20050113
http://www.winsupersite.com/showcase/longhorn_preview_2005.asp#roadmap
http://www.techzonez.com/forums/showthread.php/13533-The-Road-to-Windows-quot-Longhorn-quot-2005
The Road to Windows "Longhorn" 2005 
 By Paul Thurrott  January 13, 2005