System Transfer along with Wiimote, Pro Controller and Classic Controller options for Nintendo eShop.
Version 5.1.0 U, available via an Internet connection, includes the following improvements:
Wii U to Wii U System Transfer
Users can now transfer (move) all software and data from one Wii U to another.
A “System Transfer” option has been added within System Settings.
Click here for additional information on this feature.
Changes to Nintendo eShop:
Users can now navigate the Nintendo eShop using a Wii Remote, Wii U Pro Controller, or Classic Controller.
Improvements to system stability and usability:
Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.
— Wii U System and Feature Updates
Source: Support Nintendo.
…Wanna play? Buy a Wii U.
And if you’ve already got yours, here are all the games already available on the platform. 😀