I expect Switch to average around 200,000 units sold per week until 2023. The average may seem a bit high, but you gotta account for holiday sales. There's probably enough of a handheld market for Nintendo to still sell to 50 million handheld users. A non-crappy Nintendo home-only console would probably sell around 20 to 25 million lifetime. Switch grabs both these markets for a cool 75 million sold worldwide. Sure there's some crossover such as many 3DS owners also happening to own a Wii U, but having all their games on one system will allow Nintendo to attract a lot of lapsed fans, that would have passed on a 3DS2, or a Wii U2.
Anyway I voted 81 million.
Switch won't have a problem competing with XB2 or PS5. They won't make a portable sytem, since they're both about power. And Switch is good enough to be a secondary system for many PC/Xbox/Sony gamers.
