hahahha i reversed image searched it and its photoshoped if your aware deviantart is for photoshopers and in the description he said this will make your windows 7 and vista look newer thats why he calls it windows 8.
and if you ask the gfx people here they will recognize that the light source on the windows icon in the picture is used on ps with a 300 px white brush to make that light, this is fake and photoshoped
heres source of fake windows 8:
Windows 8 Professional Edition by ~mufflerexoz on deviantART