I'd be more exited if it looked like Google had addressed some of Steve Mann's critiques from the initial announcement, but as far as I can tell, the critique is still not addressed:

http://spectrum.ieee.org/geek-life/profiles/steve-mann-my-au... (For discussion on Glass design, look for the paragraph starting: "I have mixed feelings")

FWIW it appears Mann is working with a company on a different system for mediated reality:

https://www.metavision.com/