I suppose it's "too soon to tell". But I did read an article, I think in USA Today, but not sure about that--- anyhow, it said that battery replacement is a very real concern, and as a result, in the near future, we should start seeing "lease" options on the batteries. you would buy the car without batteries per se, and lease the batteries.
The article also pointed out that when the batteries reach the end of their usable life in a car, they still have around 85% life remaining for other applications. The article did not however point out what those "other applications" might be.
Willy