not too surprising considering where we are in PS3 life cycle(5 yrs in) still would be consistant with PS3 10 yr life cycle support. Rumor for now but lotta smoke.
http://www.pcworld.com/article/239469/could_the_ps4_really_be_on_the_way.html?tk=out
http://www.cinemablend.com/games/Sony-Says-PS4-Arrive-Devs-Max-Out-PS3-34459.html
http://ps3.ign.com/articles/118/1180451p1.html
http://www.engadget.com/2011/07/05/ps4-production-to-begin-later-this-year/?m=false
http://www.pcworld.com/article/239469/could_the_ps4_really_be_on_the_way.html?tk=out
http://www.cinemablend.com/games/Sony-Says-PS4-Arrive-Devs-Max-Out-PS3-34459.html
http://ps3.ign.com/articles/118/1180451p1.html
http://www.engadget.com/2011/07/05/ps4-production-to-begin-later-this-year/?m=false