PS4.
The XB1 has more(more AAA) exclusives this fall, but after that PS4 is going run away with it. Dec 11 2015 is just 4 months away from UC4. Also your WiiU has a few big games this fall if the multiplats don't interest you. Also, since you are just going XB1/PS4 at that point it would be a good idea to get TLOU:R and Bloodborne at that time before the floodgates on the PS4.
psn- tokila
add me, the more the merrier.