I think Glass will be awesome in certain areas, mostly related with work than pleasure. I am not an example that represents the whole, but my guess that the work field will be the Glass' nirvana and the rest will be covered by devices less obstructives with your look.
That's interesting. What are the work use cases you're seeing value in? (I haven't been in a formal office for so long, I may be missing the opportunity there entirely)
For example:
1. A police will start a suspect detention, then he starts recording the procedure as well his partner, so that video goes directly to the cloud and the police station officers can have for later reviews. This could be really nice for example it would provide many point of views of the action done and a police would not be charged for abuse of force if everything is recorded and, a citizen can be protected in case the officer abuses force.
2. inventorying. Scanning code bars, access items in a database, ask for availability, many things related to store management can be done by employees.
3. Medical: doctors can record procedures and save the images/videos to their systems, they can ask talk other doctors for opinions without even picking a phone. They can check a patient historial with better specifics. They can access facts inmmidiately, like "What's the level of O(2) blood has in case X, with person who drink remedy Y". Imagine the possibilities. Or access a vademecum, etc.
There are many uses. More than the ones I would use for fun i guess.