I finally bought a WiiU

[Skidmore]

OP the Wii U don't require games install, that's why it take a long time in loadings, it have to throw all in the Memory.
Really hope they allow some partials or full install in the future for those who wants, Zelda Wii U and Xenoblade might take a long time in the first loading, even if it uses partial loading as in GTA games.