Just looked at the end of 2015, and the PS4 is at 36,450,981.
Uhhhh Sony said the PS4 was at 35.9m by Jan 2.
Won bet with t3mporary_126 - I correctly predicted that the Wii U's LTD at the end of 2014 would be closer to 9 million than 10 million. http://gamrconnect.vgchartz.com/post.php?id=6673287