When I saw the keynote introducing Google Now, the first thing I thought of was that concept video they used to introduce Glass [1]. For example, in the video,

When I saw the keynote introducing Google Now, the first thing I thought of was that concept video they used to introduce Glass [1]. For example, in the video, the user looked at a subway station entrance, and the glasses showed a rider alert that the station was closed due to a train problem. I have to imagine that Google Now will be an important information engine behind the "HUD" displays in Glass. Glass is aiming to also follow that principle of offering you information when it's contextually-relevant, and trying to get out of the way otherwise. [1] http://www.youtube.com/watch?v=9c6W4CCU9M4 http://www.youtube.com/watch?v=9c6W4CCU9M4