I hope it goes somewhere and we end up learning some things.
That said, I would argue the point:
Many vehicles are getting worse fuel economy than vehicles of the past. Auto manufacturers are putting larger engines in bigger vehicles, which results in unsatisfactory fuel economy.
Vehicle size selection along with engine size selection are relevant to the job at hand.
Running a daily driver to work means a small car with small engine is a completely viable proposition.
If you have things to haul, then it's not.
Pickups have improved mileage to a considerable degree.
My 77 Ford 3/4 ton with 400 cid engine got 9-10 mpg running light when it was new.
Light meaning two occupants and luggage.
Various tuning methods and a modest outlay in equipment etc. brought it up to 12 mpg and it still passed smog very clean.
My present day truck, an F-150 - which used to be called the light 3/4 ton and in fact it does have 3/4 ton (or F-250) running gear - gets 17-18 mpg running light during high speed desert highway running, 70-85 mph depending on traffic.
The most interesting part about this pickup is it's ability to knock down 10 mpg towing a very un-aerodynamic enclosed box type race car trailer which was loaded to a gross of 7000#.
Along with a few hundred pounds of stuff in the pickup bed.
The big thing people forget about the Internal Combustion (IC) engine is that Detroit - as does Europe and Japan - has a tremendous amount of money invested in tooling for the manufacture of IC engines.
My opinion here is that reasonably priced conversion devices to allow running hydrogen will be what makes it for us.
Both in fuel costs and clean air.
I know, there are some who will immediately jump on this due to their hatred - deserved or otherwise - of the oil companies, but the answer is simple.
If the oil companies are allowed to distribute and sell hydrogen that would be the answer to the problem.
granted, we'd get gouged like we are now, but in the end hydrogen will be cheap, other hydrogen manufacturing methods will come on line and the oil companies will have to compete.