You seem to have a total lack of understanding about how Japan works, see you in few months to see how you will change your Mind.
PS4 has/will have at least as much( ans likely more) exclusive games you will never see on WiiUOne, so your point is irrelevant. If you compare PS3 to Wii360, its thé same.
Predictions for end of 2014 HW sales:
PS4: 17m XB1: 10m WiiU: 10m Vita: 10m