https://www.cnet.com/roadshow/news/california-2018-digital-license-plate-test/

You're probably yelling at your laptop now about that $699 price tag, and hey, we feel you on that. That's a chunk of change for a license plate, especially one that can track you but there are some possible uses for the plate that are kind of cool. We'll dig into those.

First of all, you'd never have to repurchase vehicle registration tags. The electronic plate would update automatically to show your current registration. This is mildly convenient for regular folks but super convenient for fleets. Gingerly applying stickers to dozens of cars seems like it would be a real time-suck. Finally, having a wirelessly configurable electronic plate lets it display localized warnings for road conditions or accidents. No more wondering why traffic is so slow because the guy in front of you's license plate is telling you what's what.