"If you're one of the millions of Americans who have yet to cast your vote in this democratic process, beginning on Feb. 5 and moving beyond, your voice will be heard, and we will be there with you every single step of the way, " Edwards told supporters.

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In terms of actual functionality, the core technology hasn't changed much: this is still a heads-up display that allows you to control things using your voice or by moving your head.

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Parveen's voice is powerful and moving, whether you understand the lyrics or not, says Roe.

NPR: Kevin Roe, Curator of Mollusks

One of the more entertaining posts we wrote up at last year's CES was for the Golden-i, a head-mounted computer that lets field workers control their machines using voice commands and by moving their heads.

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Presumably, Apple wants to disrupt this market the same way the iPod and iTunes made it easier for consumers to buy music, and the way the iPhone is slowly moving the cellular industry to data plans over voice plans (see: iMessage, Facetime).

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Hadfield's earnest voice and unique perch in space brings a moving immediacy to Bowie's verses, and when he sings, "I'm floating in a most peculiar way" while actually floating, it's a powerful moment.

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It is able to analyse video and audio recordings in order to recognise gestures of both posture (moving the head in particular ways, for example) and voice (such as changes in pitch).

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"When humans laugh, they voice stable sounds: that means the vocal folds are moving in a very regular synchronised way, " Dr Davila-Ross explained.

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They're moving into the terrain where all of us can rise and have a voice.

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