Sony has released PS4 system software update 1.62. "Operation quality during use of some PlayStation 4 format software has been improved," reads the official description of the patch, which weighs in at 336MB. Sony said earlier this month that worldwide PS4 sales totalled six million units as of March 2, up from 5.3 million as of February 8. Global PS4 software sales stood at 13.7 million units as of March 2. Top selling tiles include Killzone Shadow Fall, which has moved over 2.1 million units, as well as Knack, Call of Duty: Ghosts, FIFA 14, Battlefield 4 and Assassin's Creed 4: Black Flag. Sony's long-rumoured PS4 virtual reality headset will be revealed at the Game Developers Conference this week, according to multiple reports. Most recently, Edge claimed to have received confirmation of the platform holder's plans from multiple development sources. The headset will reportedly be revealed during Sony's GDC session this Tuesday, March 18. 'Driving the Future of Innovation at Sony Computer Entertainment' will be presented by SCE Worldwide Studios president Shuhei Yoshida, SCEA R&D senior director Richard Marks, and SCEA R&D senior software engineer Anton Mikhailov. Source - CVG