My biggest question has to do with price cuts. What is going to be the final price when PS4 discontinues? If you had asked me 2 years ago, then I would have been confident that Sony would have cut the price by now. But there hasn't been a price cut since it hit $300 in 2016. PS3 final price was $269, which IMO was too high for a final price, but that is what they did.
I think 125m if there is no price cut, and 145m if they go down to $200 at some point. I'm going to try to read their mind and say the final price will get to $250-$270 price range. So I voted 132.5m-135m.
Bonus Answer: I've never needed to use Sony's online service even when it was free. I don't pay for it, but I do pay for Nintendo's. If there are enough people who think Sony's service is good enough to pay for then it should be a paid service. Basically let the free market decide if it is a valuable service or not. I don't see gamers as a political group any more than any other group of consumers.
In the case of the XB1, Microsoft was trying to take gaming in a direction that gamers didn't want it to go and that is why those "features" had to change. I remember the Microsoft execs saying, "You can't stop the future from happening", but in this case gamers did actually stop that particular future.