Watch Dogs (PS4) sales are expected to drop to around 250,000 units in its second week on sale. The Xbox One version is expected to drop to around 175,000 units. The Xbox 360 version is expected to drop to around 90,000 units. The PlayStation 3 version is expected to drop to around 60,000 units. The PC version is expected to drop to around 15,000 units.
Mario Kart 8 (Wii U) sales are expected to drop to around 125,000 units in its second week on sale.
http://www.vgchartz.com/article/251638/usa-preorders-chart-31-may-2014-/
Ps4 should sold more then Wii u next week
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m