Most people you speak to on computer matters, say they have Windows. Actually finding out which version can be difficult; note some of the threads here at PCA.
I suspect you will get a number of people telling you (when pressed) they have Visa!
The bottom line is, it's all part of the pre-marketing ploy to persuade everyone they can't live without it.
Interestingly, it appears it is almost two systems in one. You will only be able to run it in it's full form on a fairly powerful system. If you run short on horse-power, it throttles back to a similar interface to XP.