We did wait about a century for battery technology to get better. Then NiMH batteries came along, and then the entire Li-Ion family of chemistries came along, and battery technology got a whole lot better.
I wonder if this is a case of future shock? Sometimes technology leaves ingrained, conventional wisdom in the dust, and some people are very slow to acknowledge it. Example. . . I still encounter those who say solar power will never be anywhere near cost competitive with fossil fuels. For about fifty years solar was wildly expensive, then solar panel prices fell off a cliff. Some folks still haven't got the memo.
It'll probably be the same with fusion power. We sometimes forget in these discussions that fission plants are merely a stopgap technology until fusion is up and running. We've repeated the joke -- "Fusion power is 40 years in the future -- and always will be!" -- so often that we've all begun to believe it's more than a joke. We've got to the point where the only thing Joe Sixpack knows about fusion is that it's never really going to happen. Joe is going to get a big surprise someday.