Given how many manufacturers are jumping on the electric bandwagon, the extremely fast decline in the cost of batteries, the rate of progress to date AND these kinds of laws to give some good motivation, I think it's very safe to say the electric vehicles on sale 9 years from now (2030) will be vastly superior to today's offerings.
However, less on the original point and more on yours, the iPhone of 9 years ago didn't have that much worse of a battery than today. Batteries have technically been progressing, but it's slow.
Those cars exist in India and China, but for some reason Americans don't want to buy them. It could be that outside of the techie bubble, nobody cares very much about this problem, and within the techie bubble, most people stop caring the moment that they can be the first person on their street to own a Tesla.
I hope you are right. Discounting the environmental and societal impact of mining the materials needed for these advancements and the electrical generation, my concern is selfish. We drive for vacations and sometimes push 12 hours a day. A quick fill up of gas in the minivan seems better than an hour or two of charging.
Others have mentioned hybirds alleviate the long distance concern. There are minivan and larger vehicles already using hybird technology, so it should work out. It is such a wild change to think about.