If charge time were reduced to 30 minutes in the general case for electric cars, I'd be much, much more likely to consider them a viable alternative to my current car. We just need the infrastructure. Honestly, I believe that the car that's going to win the transition race is going to be the one that acquires the infrastructure the most quickly, be it electric fast-charging stations, hydrogen refineries/pumping stations, electrically-charged gel stations, or whatever thing we end up thinking up.
All this talk about new transportation fuels imho always sidesteps the fact that gasoline will never run out.
Petroleum will, but producing gasoline out of other sources is something that we already know how to do, and have done in industrial scale in the past. Fischer-Tropsch is cost-effective from coal at some point below $150 oil price. If you want to be carbon neutral, you just have to use a carbon feedstock that fills from the atmosphere, and a carbon neutral heat source.
A hydrogen economy is a complete hoax. If you want to make your fuel synthetically, hydrogen has practically no advantages over synthetic gasoline.
[1] - http://en.wikipedia.org/wiki/Coal_gasification [2] - Fischer-Tropsch - http://en.wikipedia.org/wiki/Fischer-Tropsch_process
However, using coal means that you are not carbon neutral. It's a lot better to use some process of sequestering CO2 from the atmosphere -- either through plants, or directly. The plant solutions differ from plant oil or ethanol-based fuel production in that the plants are not expected to add any energy to the mix. This makes the process a lot more lenient on what you can stuff in, and makes the drain on agriculture a lot less severe. Also, since the nutrients in the plants are going to be left behind at gasification, they can be reused as fertilizer.