Soon Microsoft is going to point and say that that Desktop PCs are failing because CONSUMERS don't want desktops any more, they want "phones" and tablets instead. When the fact is that nobody happens to want desktops WITH WINDOWS 8.
Go back to the beginning of what made the IBM PC great. It was spreadsheets, databases, word processing, and boring financial programs. These were, and still are very much critical to businesses. These needs are not going away!
An operating system package that is only optimized for looking at LOLCats and clips of Family Guy, is not going to go over well with any business that has a clue. And Windows Blue shows Microsoft has no intention of backing down on this.
So what happens when you need to do a desktop oriented tasks and there are no desktops left because Microsoft killed all desktops?