Kuzo from Japanese site Rocket News recently boarded the Nozomi bullet train—the N700 series Nozomi, to be exact, which is outfitted with electric sockets and WiFi. Besides being a stunt, the test's goal was to see the breadth of the Wii U's play space.
According to Kuzo, lugging the Wii U around wasn't as bad as he thought it would be, especially compared to, say, carrying the PS3 in some sort of portable contraption.
Will this become a new trend, people carrying around their Wii Us in public so they can play New Super Mario Bros. Wii U? Probably not. But if you have three hours to kill on the bullet train and you don't might the extra load, bringing your Wii U seems entirely feasible.
Wii Uは外出時も遊べる！ 新幹線に乗りながらWii Uで遊んでみた [ロケットニュース]