Comment by Cthulhu_

I don't think they would; I'm sure they share a lot of the low level code already, the main difference now is in the user interface and software.

Some time ago (...over ten years ago) they made some movements towards unifying the desktop and tablet interfaces with LaunchPad, which looked like it was designed for a touch screen, but they never followed through. Not even touch screens on their laptops, which honestly still surprises me.