PS4 in dev since 2010?
The Playstation 4 has been in development since August 2010 according to some investigation by the folks over at Videogamer.com
Sony has been developing the "next generation PlayStation" since August 2010, according to the online CV of an ex-SCEA R&D director.
The LinkedIn profile of Attila Vass, who served as director of research and development at Sony Computer Entertainment America between May 1998 and April 2012, claims that he began working on the graphics library and security on the "Next Generation PlayStation" in August 2010.