OP, that has to have a big asterisk on the title...
Wii U is the best console to own this year(or any year) if
1. You don't care about third parties
2. You don't care about first parties of the other consoles
3. You don't care about a majority of games outside of Nintendo franchises
My Wii U, as much as i enjoy playing on it, would not carry me through a whole year without my PS4 as my main unit.
A majority of people in this thread are listing the WIi U with another main unit, this is because they aren't going to stand around for months on end waiting for Nintendo to get off their ass and make another Mario.
Nintendo always has great first party shit, but that's all they have. Its not enough on its own personally. My PS4 is what i use every day and the one i find the most useful.