We are really not far off commercially viable short-haul EV flights. Harbour Air in Vancouver is converting their fleet of Beavers to EV and a company in Scotland is working on converted Cessnas. And purpose built aircraft will likely do better than these.

They won't replace the 737 any time soon of course, but progress is progress.

https://harbourair.com/harbour-airs-all-electric-aircraft-op...

https://www.bbc.com/news/uk-scotland-north-east-orkney-shetl...