A new record for Longhorn?

Copland, the Mac Operating System which was meant to replace OS 9 as been the most expected and delayed OS of the History of computing.
But it might be beaten by Longhorn, the successor of Windows XP.
Bill Gates himslef acknowledged that 2006 as a release date was a "probably valid speculation".
At this point, we will already be running OS X 10.6 or OS XI...