Author acknowledges that price of renewable Hydrogen will get down to below a dollar per kg and then even further dropping to match the price of Hydrogen today. That will surely usher in the Hydrogen Economy in earnest, because it's the price only that's holding back the momentum. In that case who on this earth will not switch to renewable Hydrogen powered vehicles. At that price all long range transport, shipping, aviation will be on to H2. Wy would anyone bother inventing new synthetic fuels? Why would small transport stay on batteries then either, when you can fill up a typical sedan in 3 mins and are good to go 600+ kms.