A very impressive video made the rounds last year for the Cicret device; sine then, a prototype video has surfaced.
(Cicret bracelet video)
At present, Cicret is trying to raise funds for development; it's not clear whether or not this product will ever exist.
I was sure I had read the basic idea some years ago; sure enough, I found it in the works of John Varley, a 1992 novel Steel Beach:
By pressing the dots in different combinations with my fingertips I was able to write the story in shorthand, and watch the loops and lines scrawl themselves on a strip of readout skin on my wrist...
(Learn more about readout skin)
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Illustrating Classic Heinlein With AI
'Stasis, cold sleep, hibernation, hypothermia, reduced metabolism, call it what you will - the logistics-medicine research teams had found a way to stack people like cordwood and use them when needed.'
Deflector Plasma Screen For Drones ala Star Wars
'If the enemy persists in attacking or even intensifies their power, the density of the plasma in space will suddenly increase, causing it to reflect most of the incoming energy like a mirror.'