Oh, I don't think Windows UI on Linux will become a commercial product... though I wouldn't mind a more windows-friendly shell with a much more complete WINE on linux. I actually like the tool/taskbar for windows 10 (sans cortana), still prefer the win7 start menu itself.

I did also like the Ubuntu UX a lot as well, not as much as Windows. Mac's is really usable but the MacOS-like shells are not quite there for the most part, at least from those I've tried.