Obviously this is a concept, not an actually produced device.
Some of the technology proposed is clearly fanciful, such as the ease with which the fingertip-camera could be aimed at a piece of paper for parsing.
It's a solid idea to pair it with a common smartphone like the iPhone, which reportedly already offers significant accessibility for the sight-impaired, and the positioning of the on-off switch and function button seem like well-thought-out choices given human anatomy.
In the video, the lady clearly has some trouble making it seem convenient to wear the thing, though, and it strikes me as something that'd fall off quite frequently without a matching thumb strap.
Further, personal experience with photographic text parsing by smartphones tells me it only works under certain conditions, and that much of the text visible in public places is either too small or difficult for computers to recognize, for instance by being composited over or into a photographic background.
Also, one nitpick from a sighted person: when she supposedly finishes her coffee, both the weight of the cup in her hand and the pattern of coffee on the interior shows it's already empty, and was finished from the other side of the cup.
Yes, I realize it's childish to focus on that and I don't know why it bothers me, to be honest!
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