I don't see a future without airplanes as well. Especially for intercontinental transport and locations where it makes no sense to have a dense railway or motorway system. Synthetic fuel at the cost needed to capture CO2, converted in synthetic fuel, and in your ticket price, should I guess erase climate discussions there (unless they are of a more theological nature).. (environmental & health will stay regarding especially fine dust and to some degree noise. But those are a matter of volumes, a matter of viable alternatives. The higher ticket price will settle a lot) Biofuel is, if you make an honest calculation, not sustainable the coming decades, because of the deforesting that is not in the total equation.