The past decade has seen remarkable strides in the field of making car trips less boring without forcing people to actually speak to each other. I thought built-in iPod docks and in-car DVD players would top things off for a while, but General Motors is taking things to the next level with its Windows of Opportunity project, which uses smart glass as a platform for apps designed by Israel's Bezalel Academy of Art and Design. In the video below, the glass, which is restricted to the rear passenger windows, uses technologies including GPS and augmented reality to interact with four different prototype apps, including one that allows passengers in separate cars to share messages and music in ways that texting and playing the stereo really loud with the windows rolled down simply could not manage. All told, it's a neat idea, although it raises the question of why we don't have flying cars yet when stuff like this is possible. Via PSFK.