One of the great things about Linux is the ability to customize your system any way you want. I had some fun with this one. I used the Orion Theme with the Windows 8 metacity title bars and windows icons. Below are links where you can get theme. Enjoy.
You can get the GTK3 metacity Win8 theme here:
You get the Orion GTK3 theme here:
You can get the Win8 icons here:
You can get the wallpapers here:
You can do the same for your XFCE desktop as well....and see the links below...
You can get the XFCE theme, XFCEight here: