Nintendo Web Framework

The Nintendo Web Framework is a development environment based on WebKit technologies, supporting application development on the Wii U system using HTML5, JavaScript, and CSS. It also supports the Wii U GamePad controller, Wii Remote controllers, and JavaScript extensions such as video playback. With the Nintendo Web Framework, development times will be reduced and Wii U applications can be easily developed using common Web technologies. Combining the handy Wii U GamePad, the TV screen, and the Internet, the potential exists for the services and games you are developing to progress by leaps and bounds.

If they open this up and don’t restrict access to the SDK, this could be huge.