3DS will be down YoY no question
3DS is now up by nearly 90% in the US, is down by 5% in Japan (In Japan!!!!!) and of course is massive up even in Europe.
Now, nobody can know what will happen, but said NO CONTEST is ridiculus.
2020 predictions: NSW 21m, PS5 6m, XSX 4.5m, PS4 9m, XB1 3m
(PS5 and XSX predictions will most likely change after we know enough about them)