I'm not sure what people are mad at the OP about or why the PS4 and XO are being brought up.
The simple fact of the matter is that Nintendo is behind the 8-ball because they HAVE to make up for a lack of content from third-parties. Sony and Microsoft do not. That is an important consideration.
The situation right now is that potential customers for the Wii U (excepting multiple console owners) have to like Nintendo games more than Sony/Microsoft content COMBINED with third-party games. In more blunt terms, they have to like Nintendo games more than they like playing a wide variety of games or any of the (many) genres that are underrepresented on the Wii U.
It's become clear, I think, that a large number of people have decided to give up Nintendo games rather than give up on the diversity offered by the other consoles. Granted, it looks like 2014 is going to be MUCH more diverse for the Wii U but that's following a 2013 that brought very little to the table that would excite someone on the fence.
Personally, I'm curious to see if Nintendo is going to be able to pull another big (non-platforming) franchise out of the hat for now and the future. Unless they're comfortable with being niche, they're going to need to diversify.
Of course, the question now seems to be, are Wii U going to buy into any new IP or do they really just want more of the same?
