According to Sony, 5,9 million PS4 units were sold during the holidays. It’s unspecified how much of these were the PRO version. The number puts the PS4 at 73,6 million sold units, and is just 10 millions behind PS3 (total sales numbers are 83,8 millions), yet far away from the PS2’s total numbers (155 million during its life span).
There were 6,2 millions PS4 sold the under the same period the year before, but this time, the software sold more – 55,9 million games against 50 million in 2016. The numbers are combined for both retail- and digital- sales. December 2017 was Playstation Store’s best month ever.