I think they are trying to make the legacy desktop a professional and enterprise one, because there is no money selling operating systems to consumers.
If they can get the huge chunk of people who are using their computers without an enterprise domain, and without heavy workstation apps (basically just doing internet/docs/games) to use a cheap and safe iOS-style windows, then they can at least start getting 30% cut of the app sales from all those people.
I'm not too worried about that as long as there is a proper windows for professionals. In the above scenario they could start charging more of a premium than they do today for the legacy windows desktop because there would be no consumer version of it.