You can opt for a more standard desktop. Most people will just do that unless they are on a tablet or phone. Its just like having two window managers in linux I suppose. You can choose which ui you want to use.
Also I suppose...
And now they won't need windows mobile and seperate windows versions for desktop pcs. They are going to put this one os on everything.
Thats a smart move. They can lay off half their software developers (if they haven't already)