Nintendo launched the Wii Street U service for their new console last week in Japan. Our old editor Joe wrote about the still-unchristened idea last fall. The free app allows you to browse and use Google Maps on your TV, with one very big twist: You can use the GamePad, the system’s controller-with-a-screen (and motion-sensing gyroscope), to scan the 360 degree panorama in Street View in real-time. Some will label this a useless gimmick. But it might just be the feature to push Nintendo’s HD hardware into the hands of millions. — In Jesse Schell’s talk at DICE this past…