Jet Fuel from Thin Air

That's what they say here about a new process to combine some hot gases (heated by solar activity) into kerosene that could be used to power airplanes.  While the stated efficiency is terrible (1.7%), it is an intriguing thought about our non-fossil fuel future.  Perhaps Saudi Arabia will still be the world's producer of oil (or refined products), but because of their vast desert and great solar resources rather than the endowment in the ground?  Perhaps, but at an estimated square kilometer for enough kerosene to take a 787 across the US, you are going to have some seriously intensive land use.  I will probably not be self-supplying my own gasoline from a solar plant in my front yard (though I love the idea).