To be honest, it kind of concerns me. I don't own a Wii U, and don't plan to, but I grew up loving Nintendo. I even liked the GameCube to some extent. I hated the Wii. I think there are a lot like me who used to like Nintendo but just don't anymore. I'd be more apt to play a 3DS than a Wii U.
The prospect of a video game world without Nintendo is a very weird one.