I think a 1,000-mile car would get me through my summer hiking trip to Canada without having to charge while there. Typically, with the stinker, I leave the car parked at a heliport's parking area, well away from the building, while I'm off at the hiking lodge, so no charging. With a 500-mile car I could make the trip up, but I'd have to arrange for some place to leave it while I'm off hiking, where the cord is not going to be stolen, and someone to check to make sure the charging is not interrupted, and someone to drive me to and from the heliport. Doable, but a colossal pain in the neck. But a thousand miles of range, and I could just charge at home for the whole trip.
I don't expect that to be a reality in my lifetime. Mostly because I don't expect these batteries to be commercialized before I'm too old to hike, and also because, as noted above, they probably would use the technology to decrease the price of the car, and would not see a market for that much range.