I think it needs to be a set of glasses and we need better battery tech before that can really happen. Solid state batteries will be needed since their energy density is so much higher. As a low vision user i can think of an immediate use as a magnification device. Actual magnifiers dont work well for me but software magnification does. Therefore i could magnify my surroundings to read signs, etc.
Google glass was my thought too. It was just way ahead of its time, but google absolutely had the right idea