This is a classic example of solving the vendor's problem rather than the user's problem. A unified UI is scratching MS's itch. They have a problem with tablets

This is a classic example of solving the vendor's problem rather than the user's problem. A unified UI is scratching MS's itch. They have a problem with tablets eating away at their pie so they sacrifice usability because they don't want to have to write two different OSes, or rather two experiences. They already tried this when they brought the mouse to a phone, now they do the reverse.