I think this year will catch a lot of people by surprise, I think it has a chance to sell more than 2014 and 2015 respectively. Of course this depends on how well received this year's games are (and if minecraft continues to have crazy legs).
I'd like that to be true, but I feel the only chance to be up over those years is with a price cut and/or remodel.
There's very little coming this year that isn't appealing to the fanbase that's already there - look at the big games in March, for example - Miku (already on the console); Digimon (already on the console) and Summon Night - which may help, but is also on PS4 and isn't a massive series.
The only plus for this year is that Square Enix have remembered the console exists again, so maybe their games will do something.