Right now, the 100m marks seems a safe bet. Anything above that will depend on whatever Nintendo's able to develop and the amount of 3rd party willing to do big projects on the console after next gen launches.
Safe bet is not even correct unless NSW just literally dies off. I’ll give you an even worse scenario, if NSW does 22mil and peaks then it drops every year by 45%
That would be 100mil, I mean anyone that believes 100mil is literally not looking close enough xD