PS4 Hardware Sales 2015 vs 2016 vs 2017: New Years numbers posted. 2017 ends at 20.2 million

[PAOerfulone]

I've also included a new poll.

If there is enough interest, I would be willing to do another comparison thread between 2017 and 2018.

Though, I would like to let some time pass before I do it, preferably when we get to March. And that's assuming somebody else doesn't already do one. :P