Sony expects to Sell 20 million PS4 in current Fiscal Year (Apr 2016 - Mar 2017)

[Turkish]

So that's ~58M by Dec 31 2016, and ~60M by March 2017, if they don't exceed their expectations which they always have so far.

A pricecut to $299, maybe even $279 of the base model, and PS4Neo at $399, which is probably gonna sell out like the og PS4.