You can watch it live too:
It's interesting in many respects: clearly they're testing the longevity and effectiveness of their new space suit. They're also getting live footage of how their car holds up under extreme and rapid temperature changes, as well as its resistance to space debris. This isn't just a publicity stunt, they're probably doing all sorts of things with this.
It's still mind boggling to think Elon Musk just left a legacy that will literally outlast Human civilization.