The 20th century was the oil century. The discovery that oil could provide a reliable and cheap form of energy for multiple purposes created the incentive to dream up uses, like the enhanced car. The 21st century will move beyond oil. But to do that,we need to figure out how alternatives to oil can be even cheaper. If we are thinking of solar, then it is natural that we also think about maximizing our use of places where the sun shines the most: deserts.
I have seen a few stories about building large desert solar installations. But the latest idea goes much farther. Pretty interesting. Wow!