Groundking on 11 April 2014
No, I think WiiU will have yearly sales similar to the Xbone, as I see the Xbone having equally shit summer period, whilst I think WiiU will have better holidays as I think it's inevitable that there will be a price drop (NA down to $250 UK £175 EU 220) combined with MK8 and Smash should give the WiiU a great holiday period.
I think lifetime totals will be 11m for WiiU and 10.5m for Xbone with Xbone taking the lead shortly after the festive period. (PS4 will be 18m)
