Sony has announced new custom covers for the Playstation 4. The first set is based on Metal Gear Solid V: Ground Zeroes and the mascot of Sony, Toro. There are different variations based on what color (Glacier White or Jet Black) or artwork you want. You can find the images of the new covers below this paragraph.
Sadly, the Metal Gear Solid V: Ground Zeroes and Toro covers are currently only available for Japan.