I've got a few non-ninty systems a C64, Dreamcast, PS3, and now PS4.
Wasn't actually planing to get a PS4 until later on this year, but a good deal in the January sales (£280+LBP3) and the realisation that I'd just end up adding to the backlog if I waited, saw me change my mind.
Glad I did too, seeing as the next Wii U game I get might not be until May.