IT friends tell me that Office 365 and hosted Exchange are selling like hotcakes. Also remember (faintly) reading at one point that MS made more money off a copy of Android than Google from patent royalties.
I had to crack open some .NET code recently, and I am completely baffled why anyone would choose that platform for just about anything in 2017.
I guess as long as MS can find another vein they can sink the needle into, what happens to Windows is purely academic.