What is Audi A8's laser headlight technology?

I've heard that Audi A8 has innovative laser headlight technology. What is it exactly and how does it differ from traditional headlights?

Audi A8's laser headlights use a blue laser beam to illuminate the road ahead. This results in a brighter, longer-range beam that is more energy-efficient than traditional headlights.

Compared to traditional headlights, Audi A8's laser headlights offer a greater beam range of up to 600 meters, providing better visibility and safety on dark roads.