As the name implies, it's all based around pressure: a light touch performs the usual commands, while squishing the thumb's wider surface area against the screen allows the equivalent of a multi-touch gesture, such as a pinch to zoom.

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Recorded music and lectures in an all-seater auditorium, with music coming down from the ceilings and up through the floors, will be the listening equivalent to a surround-screen cinema.

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It has two small screens that when you put them on it gives you the equivalent watching a 50-inch screen.

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Its display is the equivalent, the company says, of looking at a 25in (63cm) high-definition screen from eight feet away.

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