There might be third party aftermarket replacement battery pacs available for it with better batteries, plug in hybrids are best and many people can just use the battery most times with newer hybrids. I would expect a lot of companies will start offering them for older vehicles. Some of the newer battery chemistries promise thousands of recharge cycles, up from the hundreds of that or even recent years. When that happens, the car might wear out before the battery does and it might be used in multiple vehicles if standardized. Also, cheap mass-produced batteries will mean more battery banks in homes for backup power and faster charging of EVs, they also can reduce peak demand, store alternative energy and help balance the grid's capacity.
If ya think about it, in 20 years some farms could be electrically powered with tractors and battery banks in the barn all powered by a wind turbine and the grid when the wind doesn't blow, extra is sold to the utility, maybe for a profit. The farmer's half ton could have a thousand-mile range and be charged fairly fast from home with such a system. Talk about independence, no fuel costs, energy self-sufficient.