Wearable computers, or just wear­ables, are exactly what the term suggests. The experts agree that these clever mini-assistants are going to be one of the major digital trends of the next few years. With fitness trackers, smart watches and camera glasses, modern wear­ables have already become part of every­day life. But port­able computers have been around a lot longer: Strictly speaking, pace­makers and hearing aids are also wear­ables.