Staying on 3DS at least till the new year - unless the Wii U has some insane offer on black friday in the UK (doubt it).
I am not a big console person, the 3DS is great for me as its portable. I do have a PS4 set up on my PC and I think I've turned it on 3 or 4 times. My PS3 which I got on release I think was used 10 times, if that.
I want to have the Wii U and Smash4 on that, as I love Smash 4 on the 3DS, but I am also skeptical its just a waste of money for me. But then again, I got a 3DS when it first came out, barely played it, and now I get an hour in on it most evenings.
But I certainly think I'll keep playing 3DS either which way.