[BitwiseFool]

To be honest, I can't tell you what kind of future innovation is going to result from cheaper spaceflight. But there is serious scientific and engineering potential to be unlocked. What SpaceX is doing seems environmentally unfriendly, and I know no-one wants to hear "but xyz is worse". But we really do need to keep such things in mind, because SpaceX's footprint here is completely dwarfed by domestic carbon creation. The Apollo Project lead to all sorts of spinoff technologies that we use today. It wouldn't be unreasonable to expect some of the future technological advancements to reduce pollution or carbon emissions.