In fact, Sony confirmed at E3 that the PS4 WILL NOT be backward compatible.
http://www.engadget.com/2013/06/07/nintendo-sony-microsoft-e3-2013/
Thought it still relies on Blu-ray and DVD for physical media, the PS4 won't be backwards compatible with PS3 titles, nor will your PSN purchases carry over (more on that later). And you can forget about keeping that DualShock 3 -- only Move, Sony's wand-like motion peripheral, has made the next-gen cut.
http://www.engadget.com/2013/06/07/nintendo-sony-microsoft-e3-2013/








