FattyDingDong said:

Did Sony underestimate the demand or what?

Back when they hit 60m, they where forecasting sales would be abit lower this year, and only shipping 18m.

They raised it to 19m at some point, but its probably still too low, this year should be the peak.

hopefully they ended up shipping more than that, and come April 2018, PS4 will be well over 80m.

 

Sounds like Sony did underestimate demand in the US.