The notion of implanting microchips in humans is starting to be realized, although the U.S. lags behind other countries. Microchips the size of a grain of rice enable the bearer to perform various tasks such as entering a building or making a payment.
At the current time, such implants are not very useful within the U.S., but companies like Three Square Market see big changes coming. The company recently solicited volunteers from among its employees and found 50 who were willing to have chips implanted. The chips allow the wearers to do such tasks as opening doors and logging on to their computers with a wave of the hand.
While some companies and individuals are excited by the prospect of embedding a wide range of functionality in a wearable chip, others are concerned about privacy and surveillance risks. States are beginning to pass bills that establish usage policies for chips in humans.