http://blog.us.playstation.com/2013/12/03/ps4-global-sales-update/Quote
In what is shaping up to be a historic year for gamers, I’m delighted to share an important new milestone with you. PS4’s North American debut on November 15th was PlayStation’s largest ever, with more than one million gamers picking up a PS4 in just 24 hours. Now, with PS4’s global launch expanding to a total of 32 countries worldwide, including Europe and Latin America, I’m proud to announce that more than 2.1 million PS4s have been sold.