Well the important facts
1. The Wii U is a failed concept but its success depends on the price and offer of the other consoles
2. For the PS4, unless there's really bad surprise hidden, lots of gamers are convinced, Sony continues on the strong image build with the PS3 that is continuing to sell, and they have lots of internal studios with proven AAA IPs.
So it will all depends on the price of the console, services and games
3. Microsoft has a medium position. They sold lots of Xbox 360 but are loosing momentum compared to the PS3, there's not a lot of internal studio IPs but Halo or Alan Wake. And they also have very bad rumors about always online and DRMs which, if true, will sure make it a failure, leaving the open field for a large PS4 win and a secondary Wii U win.
If not, it will also depend on the prices, but if it has good IPs, then it'll be a race between PS4 and Nextbox.
- So in short, the Wii U survival will depend on the price and function of the Nextbox and PS4. If the two console manage to have affordable prices, offline/no DRM games, and other incentives like blu-ray player, Xbox Live/PSN etc...the Wii U is dead.
Then in the case of a PS4 vs Nexbox, it all depends on what Microsoft initially announces.







