Remember how Nintendo's shitty, broken DRM marred the launch of the Wii? They have learned precisely nothing, apparently. The new Wii U has even dumber DRM:
As Nintendo's Wii U FAQ makes clear, "a Nintendo Network Account can only be used on the console where it was created." Thus, any games tied to that unique online ID will only work on the first system they're purchased and downloaded to. This is in essence the same setup that Nintendo used to protect downloaded Virtual Console and WiiWare games on the first Wii, a setup that not only utterly failed to stop piracy on the system but also caused headaches for many early Wii owners with faulty systems.