Few month ago when news spread all around internet that Google is working on secret smart augmented reality based glass project then everyone thought that it was just a rumor. But now you have to believe in rumors because company officially created a Google Plus page for Project Glass.
Google also released a video that describes the functionality of Google Glass and how World looks from behind this glasses. You can receive messages, reply to them. Also you can talk to your friend. It shows you exact path where you wish to go. Also it connects you to your nearby friend in real time. Check out the amazing video to understand this glass in more clear way.