I agree that augmented reality seems like it could be very useful on the battlefield even to a layman such as myself. As I understand it however Google Glass is already obsolete technology. Innovega Inc. demoed what they are calling the next generation at this year's Consumer Electronic Show. It combines the glasses with a special contact lens.
Demo here:
https://www.youtube.com/watch?v=H5qM...mvQ9MutlZKKnpk
And here:
https://www.youtube.com/watch?v=GXaO4m6AOv0
More interesting videos on the Company's website here:
http://innovega-inc.com/videos.php