https://au.news.yahoo.com/technology/a/25293925/nine-real-technologies-that-will-soon-be-inside-you/
5. Smart tattoos
Tattoos are hip and seemingly ubiquitous, so why not smart,
digital tattoos that not only look cool, but can also perform useful tasks, like unlocking your car or entering mobile phone codes with a finger-point?
Researchers at the University of Illinois have crafted an implantable skin mesh of computer fibers thinner than a human hair that can monitor your body's inner workings from the surface.
A company called Dangerous Things has an NFC chip that can be embedded in a finger through a tattoo-like process, letting you unlock things or enter codes simply by pointing.
A Texas research group has developed microparticles that can be injected just under the skin, like tattoo ink, and can track body processes.
All of these are much wiser choices than the name of a soon-to-be-ex.