I'm not much of a gamer.
In fact, I'm likely to be worse than many of your girlfriends at Playstations/Xboxes/Computer Games/Arcade Games/Elements.
But I kill at Wii Sports Tennis.
I don't own a wii myself, but I got into them so much that it became anti-social and ridiculous. I still fall off the edges of mario kart, I can't fly strate in sports resort, and basically screw up any game with instructions. But I have way more fun than being the catalyst for someone else to level up/do a kill streak/perform unnecessary and embarrassing dances over video games.
I get that some people thought they were useless, but I have never had so much fun with a screen.
I don't know much about The Wii U (I should probably look it up before embarrassing myself here), but with that brand name, it will reach out to people like me, especially if they market it right.
And if it has another wii sports/mario kart, I will migrate to the house of someone who does pay money for one of these things.