There's a sales pattern I see: Wii U is bought by lots of couples. Just like on 3DS, I expect a significant amount of Wii U's adoption to be driven by girls.
mine are totally Aostia-driven, but I can tell you something: young couples (with small apartments) especially witha little baby around, would LOVE the Wii U (for the offtv, for the library and so on)
at lest, that's my experience