In this video from CNET's Ina Fried and Kara Tsuboi, you'll learn "why consumers can expect more "dessert" and fewer "vegetables" from the new operating system, and talks about the reasoning behind the number 7 in the name."
I can always count on CNET to explain things so simply that even my kids can understand it. ; )
BTW, the boys use Windows Vista SP1 at home.
Here's the link to CNET's PDC 2008 coverage: