The same company that can't consistently release a successful operating system (unless you redefine success to fit Windows Visa performance) is capable not only of delivering a revolutionary user interaction paradigm with its Surface and of creating the ultimate videogame experience with Project Natal, but also steal Apple's cake by launching a tablet before their arch-nemesis can even announce theirs.
Or would it be simpler to explain Microsoft is just again using vaporware to create confusion in markets it is not ready to enter with a product, but that they feel are strategic to the maintenance of their monopolies?
On the other hand, if they are dedicating so much of their brainpower to Surface, Natal and Courier, this could explain Vista and Windows 7.