It is quite telling that Linux is nowhere on the list. This is how hard all open source desktop environments have failed.
GNOME lusted after OSX and became a bad imitation of it. KDE lusted after Windows 7’s candied interfaces, and became bloated. Xfce remains too static and people use it only it is known and stable.
There is some semblance of hope with MATE, Cinnamon, Trinity and Razor-qt, but they’re too young and still need years to achieve feature parity with Windows XP.
I’ve been using Windows 8 and I’ve found I have to fight its UI quirks less than those of Xfce, GNOME or KDE, enticing me to jump back and stop dealing with all these changes.