Well I own all three so let me give you my point of view...
Wii U, No comment, I use it for Netflix and Amazon Prime. It's the best streaming machine out of the three I own. Nothing to defend, I want a new Zelda no more remakes!
PS4... I still hate the interface on mine. At the moment I'm playing Assassins Creed. I love the new controller but hate the console dashboard or online service. I got mine at release and bought Assassins's Creed digital. It took 3 DAYS for me to get my download. Something kept happening with the online service. I do still have some intermittent online play issues. They have a long way to go for online play and anyone who says they don''t is just a fanboy in denial.
Xbox One... Originally avoided the console because all the negative stuff out there. Bored with my PS4 because of lack of games I want to play I decided to pick one up. No offense but the negativity surrounding the Xbox One is over blown. I got a deal buy two and get one game free. Installed all three (Took an hour each!!!) Addicted to Forza 5 and playing Ryse. Have not played Dead RIsing but I can tell you Ryse Son of Rome looks awesome! So far the online service has been rock solid with 0 issues and in my opinion the dash looks much better then my PS4 dash. Even the console seems to be responsive. I don't use th Kinect much but do use voice commands sometimes. I'm optimistic that eventually there will be some games I will use with the Kinect but for now nothing of interest. To tell you the truth once I got beyond the 1080P 60FPS thing and looked at the console for what it is and games it has. I realized that the Xbox One is at this moment simply a better console in my opinion. Don't get me wrong there are some annoying things with the UI but nothing they wont fix with software updates.
I know you want to just dismiss me and cal me a fanboy, you will claim I don't even own a PS4 or start talking how the PS4 is more powerful but sorry guy I just call it as I see it. I simply like my Xbox One much better at the moment then my PS4. Will that change? Time will tell...
John