Guys, let's be realistic here. There's no war between XBO and the WiiU, but the WiiU will certainly win. Let me explain you how...
I see loads of people saying the XBO will obviously win over the WiiU because they have better graphs and 3rd party support and so on, and the Nintendo guys saying that the WiiU will win 'cos it has much more cool games and so on, but the 2 key points are: (1) the real competition this generation is between XBO and PS4 (specs, audience, hype, marketing, same games and so on), and (2) PS4 will keep selling so much more and hurting XBO so much that the WiiU will eventually KEEP the second place until the end of the generation, as it targets a different audience than the former two and has a lot more meaningful exclusives.
It's so much true that the WiiU is still almost 2 MILLION consoles ahead of the XBO, even after Titanfall and Watchdogs and, not even counting this last week when it outsold the XBO by more than 3 times (or about 135,000 consoles more), XBO was selling, before MK8, about 20 thousand more hw units worldwide, what means that it would take about 2 years to reach the Wii U (1.8 MM difference / 20,000 units weekly = 90 weeks). And it if nothing happened but, as we just saw in a MK8 vs WatchDogs lauch week*, many things can still happen, and when they happen to help the WiiU it surfs alone in the Hype, but when it happens to help the XBO, it's eclypsed again by the PS4 (and I'm not happy to type it, as I personally prefer the XBO over the PS4). *And this is not even a real comparison, as WatchDogs was around for the whole week, and MK8 for just the weekend!
Finally, having settled this in a very clear way, we can imagine that Nintendo will be left then forever to a distant second place in the VG industry, but that's most probably not the case... Let's try to make a funny and hars exercise and try to figure out what will most probably happen in the long run, in the comings of the next gen:
MS, who's facing each time more and more competition of Apple in their core business, computers, and pressure from the shareholders about the XBox division, will most probably either leave the VG industry (unlikely), either do a significant move (as they're already signalizing) to further integrate their computer and gaming products, including a very simple thing to do and which has not very much been done yet: playing PC games on your TV using a more XBox like operating system in your computer and direct wi-fi connection for the tv screen and controls. That's a new horizon for gaming, but the doom of the home consoles industry, in a tsunami which will not only wash XBox out, but the PS4 or PS5 (if it's ever released) as well.
The only possible survivor(s) in this scenario will be the companys which are not selling videogame consoles, as they will vanish away, but the companies selling playing toys and collective gaming machines, which allow for playing designs not allowed by the computers. And guess who's better designed for doing that, almost exactly as happened in 1983 after the 1st big videogame crash?
Well, time to play MK8, buy a digital version of WatchDogs for my PC and start to dream with Zelda, SSBB, X and so on! (and to buy Nintendo stocks too! lol )
