"We think technology should work for you—to be there when you need it and get out of your way when you don't. A group of us from Google[x] started Project Glass to build this kind of technology, one that helps you explore and share your world, putting you back in the moment," says Google.
There's also a video that shows why the glasses could be helpful:
Google's concept glasses have a camera, a microphone and can connect to the Internet to send and receive data in real time. The interface is simple and it only shows relevant information.
One of the people who used the glasses said that "they let technology get out of your way. If I want to take a picture I don't have to reach into my pocket and take out my phone; I just press a button at the top of the glasses and that's it."
In February, New York Times reported that "the glasses [could] go on sale to the public by the end of the year. (...) The people familiar with the Google glasses said they would be Android-based, and will include a small screen that will sit a few inches from someone's eye. They will also have a 3G or 4G data connection and a number of sensors including motion and GPS." Seth Weintraub found that "the navigation system currently used is a head tilting-to scroll and click, (...) I/O on the glasses will also include voice input and output, and we are told the CPU/RAM/storage hardware is near the equivalent of a generation-old Android smartphone".
It will be interesting to see if Google will actually sell these smart glasses. There are a lot of issues that need to be solved before releasing a commercial product: from battery life to packaging so much technology in a such a small product, from improving Google Goggles to handling real-time video streaming.