But with air batteries you don't need the cycle life that you do with lower energy densities. For example, if you used the same weight Li-air battery as the Li-Ion battery, you would have a 1,000 mile range out of the empulse. If you *only get 100 cycles out of that, it's still 100,000 miles before the battery reaches end of useful life (which would just be an 800 mile range instead of 1,000...). Lots to think about, though. Charging time won't get shorter with just new chemistry - so to charge from dead a 1,000 mile range empulse would take 100 hours instead of 10. But at least there will be more options for charging - i.e., if you forget to charge one night you would still be able to get to work in the morning, or options for grid load leveling.
I would be willing to bet that Li-air batteries will be commercially viable within 5 to 10 years. That means if you wait to get an EV for 2 or 3 years, its value will drop significantly once the Li-air batteries come out. So buy now! Er, I mean GIVE ME MY BIKE!