In a bit of a move to "one up" the competition, Sony revealed today that they sold 4.2 million PlayStation 4 units as of December 28, 2013. This follows the news from Microsoft, where they said they sold 3 million Xbox One consoles in 2013.

Sony dropped this rather unsurprising bomb on those in attendance at its CES 2014 keynote today. This also follows news from "earlier" in 2013 that the company sold 2.1 million PS4 units by early December.