“Project Underskin is a “smart digital tattoo,” which would be implanted into your hand. Things like unlocking doors using NFC technology, tracking the body’s health, or exchanging information through a handshake, are all done through touch. Cooler still is that the technology to create such a device, given the current state and pace of electronics research, could be a reality in as little as five years, said NDD.”

IGN

My immediate thought: Employers could brand their employees, with the argument they’ll need a smart tattoo to enter the workplace!