Egann on 04 July 2013
Here I go with a complicated prediction.
The PS4 will overtake the Wii U during the Christmas 2014 season as it becomes the superior standalone console. The Wii U will overtake the PS4 again some time between 2017 and 2019 as the Gen 8 consoles hit midlife and the Wii U demonstrates itself to be a superior support/ secondary console.
