It's probably true that for average consumers mobile devices will be hot sell. If you are rich enough you'd rather buy something that you'll use on the go or once in a while. People that are consuming media will not need a full blown desktop or a laptop even. I personally work on a laptop and a desktop. I would not be able to use a tablet to do any work, nor would I be designing on a phone. But for the average person or average market it works. They obviously are targeting that market. Who wouldn't want to make that cash? If you are rich enough and work with a desktop you might have them all. I remembering seeing this guy with a laptop and he had a tablet and he probably didn't need both. But Microsoft needs to gain market-share there since it's being taken over by apple and a bit by google. If they don't move in advancement in that direction they will lose to those two companies. I don't think they'd want that. That being said they still should have not made it more difficult to use on the desktop. But they needed their metro stuff since they are already late to the party.