Aerys on 06 January 2014
It will reach 5M by january.
Wii U will be at 5,5M i guess.
So the most logic prediction is that PS4 will overtake WiiU the first day of japan release
Predictions for end of 2014 HW sales:
PS4: 17m XB1: 10m WiiU: 10m Vita: 10m