Re: Hmm....
In the last 10 years, EV batteries have roughly doubled in energy density for a given physical size, and are around 1/10th the price per kWh.
Granted the improvements will slow over time, that tends to be a natural trend with improvements, so I wouldn't expect another doubling of capacity over 10 years, at least not without something completely revolutionary, but I don't see why we couldn't continue that improvement at a slower pace.