A big "yes".
With the New 3DS releasing this year, plus more games earlier, I'm convinced that 3DS will surpass its last year sales.
As for the Wii U, I think 2015 will be its peak mainly due to the big sellers already on the market + tons of niche games + a possible price cut.
Bet with Teeqoz for 2 weeks of avatar and sig control that Super Mario Odyssey would ship more than 7m on its first 2 months. The game shipped 9.07m, so I won