Glass wasn't killed, it was moved under a different part of Google's corporate structure and went back to an internal project as they tried to work out a way to make it more viable/useful as a consumer product. Believe the new head of the project is the head of the Nest division of Google.
As cool as the technology was, it was overpriced, poorly explained to the public, and poorly presented by users. Apparently it was very well received by certain parts of the medical community as a training tool.