PS4 isnt as bullet proof as people like to think. There are still problems and its not going to be a totally smooth road
Xbox One isnt as dead on arrival as people like to think, though it wont do as well as the 360.
Wii U is currently in deep shit, though Nintendo have the strength and ability to dig it out of said shit. It will struggle because of the 3rd party support, or lack of.
I will eventually own all 3 systems, as all 3 will have the respective gems that I must play.