At the very least the UI needs a full rebuilding. OSX wasn't adequate for mobile computing either. But I can see Microsoft's idea of having fully compatible env

At the very least the UI needs a full rebuilding. OSX wasn't adequate for mobile computing either. But I can see Microsoft's idea of having fully compatible environments everywhere as interesting but not feasible. But they sure will continue to try. The web is a close to a write once run everywhere environment as there is today. (it's not perfect for sure).