I just came across a chapter on Wearable Computing by Steve Mann (pictured above) from the Interaction Design Foundation. The chapter is part of a larger open Encyclopedia of Human-Computer Interaction. You can read it online for free or become a member of the organization and get a PDF or buy it.
Steve Mann is the researcher who has been working on wearable and bearable computing for decades. He has developed systems that I am told are better than Google Glass.