Rooms have infrared sensors that detect body heat, so that staff don't accidentally walk in on guests, and there's a virtual golf club in the basement that lets you simulate a round on 50 of the world's most famous courses.

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It does not come as any surprise that the Defence Advanced Research Projects Agency (Darpa) in the US can see the massive military potential for a new generation of supersensitive, miniature, robust, uncooled, infrared detectors inspired by a humble heat-seeking beetle.

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Before winter sets in, rent an infrared camera to take pictures of your house and find heat leaks that need insulating.

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It also uses an accelerometer and light sensors to snap an image when a person enters a new environment, and an infrared sensor to take one when it detects the body heat of a person in front of the wearer.

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