Never. You should wait for the new Nintendo System in 2022.
The Nintendo Switch is already the hardware evolution of the WiiU , the Switch is the WiiU Pro.
EDIT : let's see how long it takes before I get insults of "troll" and finaly be banished for defending my point of view.
Current PB on Secret of Mana remake : 2h27 (2nd)
Strongest worldwide achievement on TGM : 1st European S13 rank
Fastest TGM3 MASTER in Europe : rank Master V in 5min10
Western record on TGM3 EASY : 1484
Current PB on Power Ranger (Game Gear) : 10min06 (World Record)
Non-geek activity : ThermalHungary