Or a Wii U.
Humph, why am I even trying?
Don't get me wrong, I have no interest in buying a PS4. It's clear that the Wii U and PS4 target pretty different audiences, although they have some common ground -- namely, people who love playing great video games.
It just seems to me that if you were considering buying an Xbox One because of the games that have been shown for it, the best alternative to give you a similar (but better, and also more affordable) experience would be the PS4. For instance, you want a One for Titanfall? Better off with Destiny on PS4. There isn't really a comparable game coming to Wii U... I guess it's getting Call of Duty, right? Psssshhhh
The Wii U is going to become a fantastic console with a great library of games. I think it's going to be a lot of gamers' "and one" console alongside the PS4.