To be fair if you already own a 360, PC, or PS3, you have access to most of the games coming out this holiday. The Wii U has a couple games that seem pretty cool, and they're actually exclusive to the system. So in that sense, the Wii U basically does have the best lineup this holiday.
Or you could just say the 360 and PS3 have the best lineup right? And if you'd like some better versions of those games, PS4 and Xbox One, your choice.
I'm looking at it from the perspective of someone buying a new console. PS3 and 360 may have a better lineup than other systems, but we all have one of those already. If someone is looking to have access to games they can't already play, the Wii U has both of the other consoles beat this year. Which is not to say that the others aren't worth getting, just as long as everyone knows they're paying $400-500 to play a shinier version of a game they could play on their last system.