Just the nanowire battery would cause a huge increase in EV demand. Fleet vehicles, commuter cars, lotsa vehicles are stored overnight every night and then used for only a fixed amount of mileage each day. All of these vehicles could be charged at night when other electric usage is low and then used all day.
A quick charging battery isn’t necessary for those fleet type uses. They have predictable usage and plenty of time to charge at night, as you say.
A quick charging battery is the key to getting EVERYBODY ELSE to buy into electrics. The regular stiff that forgets to turn on the charger at night or wants to take longer trips than his usual routine. That is the guy that wants the comfort of being able to recharge in a few minutes time.
What intrigues me more is what these nano-wire batteries mean in terms of watt-hours per kilogram. Making battery packs smaller and lighter makes putting them in vehicles much easier. It could also lend itself to swapping batteries for an even quicker “recharge” method. Suppose instead of having 600 pounds of li-ion batteries, you had 4 packs weighing only 20 pounds each ? Swapping packs for freshly charged ones would be simple and take seconds.