That’s a lovely utopian scenario, nemmart, but I doubt FF would bring it about. While fuel costs are a significant part of the cost of airline operations, they are by no means the only costs involved — labour costs and capital outlays will always be there, and FF does nothing to address those. At best you might get a 30% reduction in the cost of air transportation, which is not small, but of course transportation is only a small part of the cost of transported goods, so that reduction will play a very small role in the final price of a product, and likely be washed out by other competitive factors.
If FF works it will indeed be fantastic, but I don’t think it’s enough to produce the radical changes you posit.
