Vista is out but whose buyin it :

When the successor to the Windows XP throne was being touted, it promised heaven on earth--a pass to the Utopian kingdom of computing.

As i write this, obsessing over Windows Vista is the order of the day. Will it kill your PC ? How much better than XP is it, anyway? Will the Aero interface ever stop looking pretty? When it was launched , nobody expected its sales to turn out the way they did -- Vista surpassed Windows 2000's first-month sales, and came quite close to XP's.

Five years after Windows XP, the latest desktop OS from Microsoft promises better hardware support, security and a spruced up user interface. It also has steeper hardware requirements.

If you've been reading the news, you've no doubt read Microsoft's proud "Vista is the most secure Windows yet", and Symantec's sceptical "Yeah, right".Vista's focus on security cant's be argued, though-- from soliciting the US National Security Agency(NSA) for help, to the ridiculous number of features to protect you from the Bad Guys.

Where Vista scores:
Windows Vista offers enhancements in end-user productivity including the Aero interface; Windows Flip and Flip 3D. It also improves on the XP search function.
For people with intention to upgrade to Vista here's rundown of it's significant features or improvements:
http://rahulsblogbeta.blogspot.com/2007/02/vista-window-with-change.html