So what or where do you expect the PS4 to be at the launch of the PS5?
If PS5 releases in March 2020: PS4 2019 (15M) + PS4 2020 (5M) = 111M LTD PS4 sales. In this case I could say its lifetime sales would be hardly any more than 120M
If PS5 releases in Nov 2020: PS4 2019 (15M) + PS4 2020 (12M) = 118M LTD PS4 sales. In this case I can see lifetime sales being around 130M
If we go on a conservative 80% of sales made until launch of PS5. Then it getting 111M by March it would mean 139M, and if by Nov it would get to 147M.
Even if we expect the worse legs like PS3 (don't think it will do it because price cut will be more feasible on PS4) then we get 123M and 131M.
Anyway nothing suggests below 120M at the moment.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"