Electromyography is an awesome technology, among other reasons, because it can (or will) detect neural signals below the activation (movement) threshold, meaning you should be able to train yourself to type without moving your fingers. A viable way to thought control without the invasive aspects of other approaches.
Back in the nineties, I said the computer user fifty years from then would look like a hippy. Headband (neural interface), sunglasses (I thought monitor, but AR is cooler), and a crystal around their neck (optical computer, maybe a miss, we'll see what the next decade brings, a slab in a pocket will do for now). Given my zero trust of end stage capitalism near my noggin, wristbands are an excellent transitional, as long as they're local (or can be made so, happy jail breaking)