Wii might not sell like the DS but if it does expect the PS3 to do PSP numbers and the Wii to do DS numbers and the X360 will be left behind in the wake of both.
End of 2014 Hardware Predictions (03/03/14)
PlayStation 4: 12-15million
Xbox One: 7-10 million
Wii U: 8-9 million (Changed 01/04/2014 from 7-9 --> 8-9 million)