Editor's Note: As cool an idea as this is, I'm not totally buying it. Sure the Wii U GamePad is essentially a bigger (although more advanced) DS and the 3DS is capable of processing some great visuals but I'm not sure it can handle the task of being a GamePad. Does the 3DS have the graphical capabilities needed to play Wii U games? Could the resolution settings of the Wii U games be downgraded when played on the 3DS hardware? I don't know. Using the 3DS as basic control for the Wii U on the other hand, is something I'd find more believable and a great idea within itself.
I do like the idea of a second GamePad and this would surely give people who already own a 3DS a nice, cheaper alternative to buying a separate controller. So hopefully there's some truth to this and Nintendo can somehow pull it off.
A new rumor has emerged from the French Nintendo fansite Nintendo-Master.com, which speculates that in the future, the 3DS could become a Wii U tablet of sorts, thanks to a cartridge add-on that Nintendo-Master's sources say is "currently in development"!
This cartridge will allow a sort of streaming similar to the Wii U and the GamePad and it will allow the 3DS to be a controller for your Wii U. Unfortunately, only those who bought the Circle Pad Pro accessory will be able to use this feature, if this "product" becomes a reality.
WUD suggests a receiver capable of transferring data between the Wii U and 3DS could fit inside this cart.
What do you think about this?