Where has it been confirmed?
All the media outlets keep talking about it. End of the month event, going on sale on so and so specific date.
We know that how?
Vista carried technology Apple has been using for a few years and Microsoft thinks its the newest stuff around. Then you got the Microsoft nerds who have never seen this desktop technology before thinking its the greatest interface ever. Had they gone Mac, they'd realize it's been around for a while.
Microsoft even copied the layout of the the Apple Stores for Christ sakes. Same wood paneling and everything. It's just an ongoing joke with MS.