'Ring' to turn arm into touchpad

                Scientists have developed a new wearable technology that may be able to turn your entire lower arm into a touchpad for a smartwatch. Called SkinTrack and developed by researchers from the Carnegie Mellon University in the US, the new system allows for continuous touch tracking in the hands and arms. It also can detect touches at discrete locations on the skin, enabling functionality similar to buttons or slider controls, researchers said. SkinTrack requires only that the user wear a special ring, which propagates a low-energy, high-frequency signal through the skin when the finger touches or nears a skin surface, researchers said.