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Intel also showed off its RealSense technology — a combination of a 3D camera and software that allows PC users to control devices by gesture — which will be built into ultrabooks later this year.
Here, the technology is being used with a holographic display which makes it possible to play games and interact using gesture — for example, pressing buttons on what to others might look like thin air.
Here, the RealSense system is using its 3D camera to track the user's hand and display it on the screen as part of a game.
Here's another example of RealSense being used in place of a keyboard or mouse.