Although just a concept right now, the nanotech display is entirely feasible in terms of application. It would function as a programmable display implanted less than a millimeter under the surface of the skin. The display would be controlled by about 3 billion pixel robots that emit photons to produce an image. It could have a number of uses, measuring blood pressure, checking vital signs, contain lists, etc. It’s interesting because it opens up the possibility of having a visual interface on the body. The display could maybe even be connected to the internet and function almost like a computer.