Batteries are not just for charging and moving us around in our cars in the future. We're going to be using that stored energy and putting it back into the grid and fueling our homes electricity in the future with this technology. While this seems like it's quite far away we can also look at all the progress we've made in the last decade with new technology. For my reference: https://www.bloomberg.com/news/articles/2018-04-08/cities-running-on-car-batteries-just-so-crazy-it-might-work