WiiU is 2 years old today, how much do you expect it to last?

[WhiteEaglePL]

2015 Peak Year.
I want 30m+ sold LT.
I [currently] expect 25m.
I want it to last until 2020
I expect it to last until 2019 - where at end of Year new home console releases.
(2018 for 3DS successor. And Vita, if there will be one.)