UK Cars Now Using Rear HD-Screens Instead of Windows

The new Swedish-made Polestar 4 will be the first car on UK roads to replace a rear window (and traditional rear-view mirror) with a high-definition screen showing a real-time roof-mounted camera feed. 

Two Digital Cameras With Feed Displayed In ‘Mirror’ 

In fact, instead of a traditional rearview mirror, the Polestar 4 has a high-resolution rear-view display in the shape and in the place of a normal mirror that receives the feed from the two roof-mounted digital cameras. Polestar describes this as a kind of 2-way mirror because it also doubles as a regular mirror, making it possible to switch between the live feed and a view of the rear passengers.