e-skin

A film (one-tenth the thickness of a strand of human hair) made of flexible, ultrathin layers of organic and inorganic polymers. Laminated on like a temporary tattoo,  e-skin is a technology that allows the skin itself to serve as a computer display.

Historical perspective: The prototype, developed by Japanese researchers in 2016, was designed to measure vital signs, such as blood oxygen level and heart rate, but researchers say the e-skin could eventually give your hand or arm the power of a smartwatch.