I hardly doubt the Wii U's small library is much of a problem. You know, the benefits of backwards compatibility and all can really compensate for that.
On that note, it's a pretty clever form of advertising. At this point your shoving the console right into the faces of hundreds of potential customers that will finally know that the Wii U is actually a console and not a peripheral add on.
And as we all know, good word-of-mouth is a very powerful tool. (Now all they need is holiday adds. I mean the 2DS had fucking television advertisements.)