From SmartPlanet:  ”What if the back seat of your car were invisible?”  Researchers at Japan’s Keio University are developing technology for what they’re calling the “see-through Prius,” a car that will allow drivers to look to the rear of the car and see what’s happening on the street behind them, creating a “glass car” effect.  The car will be showcased at the 2012 Digital Content Expo in Tokyo.  Pretty cool, although we’re wondering if the people in the backseat become invisible, too?!