66-80m

Worst case scenario-100 million
Best Case scenario - 150 million

My prediction- 120 million. I expect the system to peak in 2020(Maybe 2019 depending on what's releasing that year.) The combined support of both handheld and home console ecosystems will help the Switch a lot. It has a monopoly on Handheld gaming. (Something a Nintendo handheld has never had). Plus a revived home console market. I expect it to do well.

My expectation ranges from 80-120 million depending on mid-gen upgrades, software, and how Nintendo handles things. I decided to low ball my expectation in the poll and said '81-95 million', but I would not be surprised if it surpassed the Wii.

I'm thinking 75-80 mil, so I chose the 66-80 mil option.

120-150m+

Anyone who says otherwise is a Sony fanboy.

PS. Sony or MS will be on their arse (from a gaming PoV) by the time a Switch successor releases.

Nintendo is set to take 'all' of gaming, mark my words.

Edit:anyone who thinks MS or Sony will survive against a Nintendo handheld + Nintendo home console w/sound gimmick is deluding themselves. Switch will rewrite the rules. Switch isn't the start of some silly 9th gen. It's a revolution.

New Gaming Generations start when Nintendo says so.

^{Disclaimer:Sony/MS might successfully counter attack but I doubt it.}

⚠️ WARNED: Trolling ~ CGI

If they do a mid-cycle refresh similar to PS4 Pro and XB1X, north of 115-125 million.

If they don't, minus 20-40 million from the above.

They key for Nintendo is not having declining sales in a large after 2020 and that's going to be a bit of a challenge because they'll have released most of their major IP by then. The solution is a significant mid-cycle refresh, it's keeping Sony and MS' numbers inflated in the second half of their life cycles, the same can happen for the Switch. 

Let the "b ... but you can't divide the userbase!" people whine and cry. It's 2018 already, it's time to move on with the times, everything from smartphones to tablets to Playstations to XBoxes have iterative upgrades that are significant more often than every 5-6 years. That hardware philosophy is badly outdated and only serves to hurt your hardware/instal base. Gotta give yourself that mid-gen boost. 

I'll try to stick with my prediction from 1 year ago.

Switch:
USA: 30 M
Europe: 25 M
Japan: 25 M
Other: 10 M
Total: 90 M

PS4:
USA: 40 M
Europe: 45 M
Japan: 10 M
Other: 25 M
Total: 120 M

XB1:
USA: 33 M
Europe: 17 M
Japan: 0 M
Other: 10 M
Total: 60 M

105 million

They are probably close to 20 million sold through in a year and a half and without any price cuts, big bundle or big deals. There is still not much of their biggest sellers out. Switch still has no exclusive Monster Hunter/2D Mario/Real pokemon game/good party game/exclusive mario kart/Animal Crossing/Smash.. they have so many marketing possibilities with the thing.

Sales will exodes during the end of this year and 2019 has already more big games than this year. Once they are willing to drop the price and make bundles/collectors/deals it will be unstoppable. It will probably get a revision too.

Honestly it might not outpaced the wii in its prime (but i think it will next year tbh) but the Switch has something the wii didn't have, a good reputation amongst gamers. Families love the Switch and once they give them Mario Party and 2D Mario they will love it even more. Gamers love the Switch and once they get Smash/Core pokemon games/Metroid etc, they will still love it. Everyone loves it and it wont get shit on later on like the wii did since its able to get some 3rd party games and propose a good gaming experience.

So yea, will have big peak years in the near future and will last atleast couple years longer than the Wii, so i don't see it not outselling it.

I went with 81-95m. Of course, I would love to be dead wrong!