MS has been doing this weird dance where they tried to smoosh two OSes together and created one bad OS. The absolute worst was when Windows 8 first came out, and I keep accidentally getting into tablet mode on my non-touch screen laptop.
Apple is taking the correct course which is to build a new OS from the ground up and adding power. MS made gigantic missteps by trying to force a windowing OS to support touch.
Both are somewhat meeting in the middle, and now Surfaces have gotten pretty decent, but they started out bad.
The other thing to remember is that people buy tablets for touch, and Surface Pros are pretty decent laptop replacements but still so-so as an actual tablet.