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It is the first to bring PC users the ability to play games using the remote control's 'motion drive' feature, which controls on-screen objects according to the movement of the remote.
ENGADGET: Lenovo IdeaCentre A600 All-in-One Desktop unleashed
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Infra-red communication suffers the same problems, but has the additional limitation of requiring a direct line of sight between objects as anyone who has tried to operate a television remote control with someone else standing between him and the television will know.
ECONOMIST: The human body as a computer bus
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It indicates that most of the processing work - identifying people and other objects in view, and deciding what information to show about them - would likely be carried out by remote computer servers in order to keep the equipment slimline.
BBC: Microsoft patent