Tingly projections make beamed gadgets come alive

Tingly projections make beamed gadgets come alive - tech - 30 May 2013 - New Scientist: "T'S A creepy sensation, having a little keyboard permanently emblazoned on the back of my hand. No matter what I do – shake my hand or wave it – I can't make it go away. Creepier still are the soft tingles on my skin as each "key" is pressed, like a low-frequency electronic buzz."