I think the Switch will obviously do around 30 millions this year. We will be able to make better prediction with the next quarterly reports.
It would be a breath of fresh air to have a new console take the crown as the best selling of all time. Switch would look pretty on that throne.
Nintendo has been expanding a lot this generation. Attraction park, Mario movie coming in the Switch's lifecycle and Netflix having wishes of a Zelda series will just push Nintendo forward. It could give them more brand recognition and enlarge their target audience. If the Mario movie and Zelda series happens and does well, i can see them making more moves like this like a Metroid series or Movie (knowing Aliens as a franchise on screen pretty much died and the Metroid IP will get pretty valuable after MP4).
This is exciting times, glad Nintendo is finally loosen up.