Wii U - Already have.
PS4 - Probably at some point since the price is not outrageous this time around, but not in any hurry all the same.
Xbox 1 - I didn't buy a Kinect for my 360, so the forced extra $100 on the purchase price makes this the least desirable for me. I really enjoy the Halo & Gears of War games so maybe in the way out future.