Virtual keyboard via arm bands

Essentially an arm band that can listen to how your muscles are tensing in your arm, e.g. how the band is deforming. Essentially you type with it on for a while, then you can take away the keyboard and do the same movements and it’ll type for you. Means you can put your hands by your side, as it gets better you can minimise movements until you’re almost just thinking of moving your finger and it’s happening.