We have backup sensors, rear-mounted cameras, and even cars that park themselves. But despite all these aids, drivers still back into lamp posts. So researchers at Keio University in Japan have developed a prototype vehicle that turns the back seats transparent when reversing.

The “see-through Toyota Prius” on display at the 2012 Digital Content Expo in Tokyo utilizes a camouflage technology that displays what’s behind the hybrid hatchback in the vehicle’s rear passenger area...The invisibility system takes video footage of the space behind the vehicle, then projects the streaming feed onto the back seats, giving the illusion of transparency.