Without knowing what Car Thing was, I read all 3 of those pages and still have no idea what this project is.
Some Chromium shell with yet-another-appstore that can somehow show (or maybe control) Spotify, Discord and weather, with Trello and Audible planned is my best guess. I guess, a couple screenshots or photos would've done wonders in this regard.
Either way, I fail to understand why I might prefer a separate low-power device to do something with the apps I can already see and control from desktop. But I'm glad someone found a use case for their Car Thing.
I'm just a guy who hasn't even graduated college yet ¯\_(ツ)_/¯
Cheers