BMW took to CES to show off its new i8 Mirrorless concept, which swaps out traditional side mirrors in favor of rearview cameras, mounted on on aerodynamically optimized holders. There's also a third rearview camera, located at the top of the rear hatch glass. Images from the three cameras are combined into a single image, which is displayed on a high-resolution LCD display that replaces the traditional rearview mirror. Featuring a greater viewing angle that effectively eliminates blind spots, the digital display is able to flash warning signals if there's a coming up fast on either the left or right side, alerting the driver that it's not safe to change lanes. BMW will begin testing the system in Europe this year, with approval from the US Department of Transportation likely coming in 2017.