Yeah, those are all very good points.
I think it's possible to have multiple standards, though. You won't have every gas station on every corner supporting every format. As it stands, you can get gas, diesel, kerosene (which is basically diesel anyway), and propane (not in a format usable for cars, but they could) at many gas stations. Sure, there will be some, but there would be lots of small independent places that support only one or two standards -- consider how you can buy biodiesel now. Sometimes it's a place like a gas station, but often it's some other energy company, like a home heating oil company. You'd have similar stuff happening for other fuels.
If there is going to be one standard, it will almost certainly be some kind of liquid fueled internal combustion; nothing else delivers the same versatility and convenience. That soccer mom, the small business owner, emergency responders, delivery drivers, joyriding kids, on-site technicians/health care, and so many other road users won't find other options viable.
Unlike with dinosaur juice, that fuel probably won't be the energy source -- we're looking at biodiesel, ethanol, or something similar. The fuel becomes separate from the energy source and any energy source can be used to make the fuel.
I think that any new technologies will have to be adopted by commuters first. Commuters can deal with limited range, long time spent refilling, etc. That's how you can leapfrog the infrastructure issue, since commuters don't need a gas station at every corner, just one they can go to every time. Whatever the fuel, as long as I can get it at home or a known spot near my commute, I'm fine.
Or, maybe Gary's in-wheel hydraulic hybrid setup will stretch dinosaur juice enough that we don't need another fuel. I can hope, right?
Is it funny that the song "Turn! Turn! Turn!" by The Byrds just came on?
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