i have only been on Linux for a month at best. i was using Win8 prior to that on a few months-old laptop. it has not been that long SU.
Windows 8 has no start menu, true. but it has tiles too. this looks nothing like Windows 8's desktop app, and last i recalled, it couldn't be themed (a big problem with Win8 is every computer has the same desktop, no color customization, only desktop supports wallpaper changes)
there is nothing abou the screenshot that looks anything like Windows. not even the icons are right. it really does come off looking like a theme for KDE or Gnome--in fact i can quite easily recreate Windows Phone 7's metro interface on Android just as easily.
"If you treat your system like a kiln, don't be surprised when a brick comes out the other side."