Development on the next-generation PlayStation 4 was fully underway by August 2010. That's according to the Linkedin CV of a former SCEA R&D director Attila Vass. According to Vass' list of 'projects', he was working on the 'Graphics Library' and 'Security' for the "Next Generation PlayStation" from August 2010 to April 2012.With his work on Vita listed separately, it would seem that he's referring to the as yet unannounced PlayStation 4 console. "I worked on graphics ( COLLADA, PSGL ) and a lot of network related technologies ( advertising, telemetry, PVRs ) for the Playstation2-x, PSP, Vita and Next Generation platforms," said a now-removed summary statement on Vass' CV. Sony UK has declined to comment. Sony has said it's not prepared to reveal its PlayStation 4 console until the system can demonstrate 'a significant leap' in technology.