https://www.cnet.com/roadshow/news/audi-e-tron-aerodynamic-dimples-camera-mirrors/

The tiny cameras seen on the Audi E-Tron prototype make the entire vehicle 5.9 inches narrower to begin with, but also reduce both drag and wind noise for occupants. Their output is shown on OLED display panels mounted at the intersection of the doors and dashboard, and can also be shown on the MMI infotainment display for parking or maneuvering. Although many concept cars have used camera mirrors like this, we haven't yet seen it on a production car. Nonetheless, Audi promises the feature as a "high-end option" for the E-Tron. An Audi of America spokesman confirmed that camera-based mirrors are not currently allowed under US law, but said that, "we are working with the authorities to see how we can make them available."

These cameras aren't legal in the US – yet.