Sony announced it's limited edition PS4 "Dragon Quest" at a press conference in Tokyo and will be released in Japan in 2015. Sony is releasing the limited edition PS4 in order to celebrate the release of their series game "Dragon Quest Heroes" which was also announced in Tokyo.
The silver console and DualShock 4 controller as shown in the picture has the Dragon's Quest mascot "Slime" printed on them while they have also added that metal "Slime" "melting" acting as a USB cover as well. Also the console clearly has a "Dragon Quest" decal at the corner of the console.
Bare in mind that this limited edition PS4 is planned to be release only in Japan.