I gotta wonder, is anybody at Microsoft really surprised that their decision to completely rework all of their 25-year standards of how their OS works has side effects of varying levels of bad in a huge number of relatively obscure use cases? This sounds like such a textbook example of why you don't do that.

I'm still running Windows 7 on my desktop PC. It has a mouse and keyboard. I have no intention of ever getting any kind of touchscreen, pen tablet, touchpad, or other alternative input device for it. I'll show some enthusiasm for upgrading when they make the mouse and keyboard first-class citizens again, instead of treating them like an afterthought in an attempt to get some traction on tablets.