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The PlayStation 4 will support "navigational voice commands" and "facial recognition" through the PlayStation Camera, according to YouTube user lex1020's recording of a slide from Sony's presentation at GameStop Expo 2013.

At the GameStop Expo, SCEA's Group Manager of Retail Training and Advocacy Sean Coleman described the camera's ability to "track your body movements in games or even recognize your face for easier system navigation."

A Sony Computer Entertainment spokesperson confirmed with Polygon that the PlayStation Camera "allows for voice recognition" and that more details will be shared "in the lead up to the launch of the PlayStation 4."

-Source