It's hard to see any manufacturer seriously revisiting the Windows story on mobile platforms. It has died a couple of times already, and for a casual observer it looks like Microsoft is more committed to Android+iOS story now too.
Here's a demo video they released at the start of the year: https://www.youtube.com/watch?v=A_GlGglbu1U
Also, it simply doesn't make sense when seen through a buisnessman's perspective.
Has been said so many times before.
I've heard this joke before, but go on..
Phone software is so radically different to desktop software that attempting to target the same program to them both makes both worse.