Sony want to get a foothold in the new 3D market for films and games and they are aware that Nintendo's 3Ds the three dimension version of the worlds best selling hand held will soon be in the market.
Nintendo's 3D offering doesn't need special glasses and relies on viewing angle to create the 3D effect.
It may a few years yet before 3D TVs and gaming gain market share to get people to buy the new technology, a technology that has little support at present.