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.
Samsung Galaxy Precedent (rooted, AreaRom 3.4 , sd-ext w/ 3.65GB internal space)
Kindle Fire (1st Gen, rooted, AOKP JB 4.1, Nova Launcher)
BlackBerry Curve 8520 (Work)