The whole idea was that the speaker would talk for a while, and then occasionally show a slide that illustrated a point with a picture or a striking image, or made a set of numbers clear with a bar graph or a pie chart.

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"What you're doing with photography is exposing a whole image at once and not scanning or breaking the picture into bits, " he says.

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Each mirror acts as a beam-steering device, controlling whether a single picture element (pixel) in the image is light or dark.

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Tilt-zoom gives you a new way to zoom within the browser and picture gallery app, whereby you tilt the phone up to enlarge an image or down to shrink it.

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Login passwords can be replaced by a simpler PIN or even Microsoft's innovative picture login (where you tap on specific areas of an image), but there's no way to tell the OS to only ask for credentials after a certain period of inactivity.

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