Neural input devices could become a thing in the next few years. I, for one, would love to have a wearable which could translate neural signals into text and directional input - in lieu of a keyboard and mouse. My inevitable carpal tunnel could stop advancing.

Thanks to newly available hardware like MyoWare, affordable neural sensors have become available to garage tinkerers. I think it's simply a matter of time before we're all interfacing with our computers and phones via wearables. http://www.advancertechnologies.com/p/myoware.html