I agree 100 percent,
No matter whats presented to us, it seems theres a little sprinkle to a whole mountain of pixie dust getting thrown in.....We hear of the new energy sources or better stated substitutes for oil ,but rarely are they backed up with complete tests revealing the actual data or how the tests were performed,leaving us with little actual hard data, only that it seems logical to work based on sound principals.
I believe there is no free lunch,if it ran on air there would be some sort of meter or a base charge for consuming it.
Other than small changes in fuel or engines,the only new tech is hybrids and that just uses existing tech.