Yesterday Microsoft announced that it had sold 3 million Xbox Ones as of the end of 2013, and today Sony has revealed an even bigger number — as of December 28th the PlayStation 4 has sold 4.2 million units. The news was announced by Sony's Andrew House at today's CES 2014 press conference in Las Vegas, and it's double the number we last heard, when Sony revealed that it had sold 2.1 million units as of December 3rd. Of course, Sony had a brief head start, which may account for the higher sales numbers — the PS4 launched on November 15th, whereas the latest Xbox hit store shelves one week later.

According to a Sony press release, those consoles were accompanied by over 9.7 million copies of games sold at retail and in the digital PlayStation Store, and the company says that PlayStation Plus subscriptions have increased by 90 percent globally since launch.