I think it will effectively kill the Vita and 3DS in Japan, but PS4 will still do ok, though Switch I think is pretty much destined to be no.1 in Japan (if it doesn't Nintendo has really fucked up in some way).
Pokemon, Splatoon, Dragon Quest, Mario/Mario Kart, Animal Crossing, and probably Monster Hunter, Minecraft, and Yokai Watch all one device = game over.







