Now Micrsoft needs only to decide what UI to display for touch/pen use...
... which it must understand needs to be different from that for keyboard/mouse use, and vice versa.
A unified UI is just wishful thinking - it has to develop an OS and applications that can switch to the UE needed for the input method chosen.
Windows 8 was OK for touch/pen use on a small screen, but bad when used with keyboard/mouse on a big screen. Windows 10 is usable in the latter mode, but it's a big step back in tablet mode.
Let's see how many iterations MS will need to understand what is just in front of it...
Biting the hand that feeds IT
