Sony showcases games on the PlayStation 4

Sony has been showing off the first of the games that can be played on PlayStation 4. A handpicked group of retailers, gamers and journalists interacted with floating robots on the PlayRoom, an augmented-reality game.

Players use smartphones and tablets to draw objects which they can then flick towards the robots to play with.

Sony says the new console will offer a "blank canvas" for games developers including big companies and independent video game developers.

Sony gave a preview of the PlayStation 4 earlier this year. It will launch before Christmas. It is the first major game machine the Japanese firm has built since the PlayStation 3 went on sale in 2006.