X1 above PS4 in US
Japan hate the Wii U whereas X1 is not far behind PS4 and may actually outsell it throughout Q4. If sony mess up and MS don't that momentum may carry into 2016. Unlikely but more probable then Wii U magically doing well enough to keep the PS4 at bay which is outselling it significantly with only one major exclusive (bloodborne). By time of Persona 5, Tekken 7, MSGV, Gundam, FInal Fantasy XV,Deep Down and Street Fighter 5, the PS4 will have overtaken the Wii U and there will be no chance of return.