Simple answer: they can't. We keep waiting for Microsoft to refocus its efforts on touch focused UI, but it hasn't happened.
I think I can safely speak for the majority of people when I say I was grateful when Microsoft announced Windows 10, and focused once again on traditional Windows users. But the time has passed where that focus is entirely necessary. Windows 10 is in a great place on the desktop side of things, now we just need Windows 8 superior tablet mode to make a comeback. In fact, make it even better.