We've had almost 20 years of auto shows, to my recollection, with their "concept" vehicles, garnering Brownie points while holding promise of a weaning away from the internal combustion engine and toward alternatives. What, today, is there to show for it?
As far as the N. American market is concerned, most innovation appears to have come from offshore. Masses of taxpayer funding has gone into hydrogen fuel cell research, for instance, but look around you.
The GM Volt, plug-in electric holds promise but has arrived at glacial speed. For decades, the auto industry has seemed incapable of manufacturing what many backyard mechanics have been capable of, in converting cars to run off the grid.