Prediction: PS5 and Xbox Series X combined will sell less than 120M.

[jonathanalis]

I think PS5 will sell less than ps4, but more than PS3, maybe on par wth PS1.
Xbox, I think it will sell on par with xbox one.
I think a low budget lockheart version can push these numbers.
So, 150 to 160M

BTW, In terms of technology, I think is a bigger leap than gen7 to gen 8.