Well… about 20 years ago it was not THAT uncommon for nerdy / techy people to put a small Linux powered PC into their car for all sort of things. I personally had a system build around a passive cooled Transmeta Crusoe based board running on some Suse Linux sitting under the passenger seat of my Escort Mk 4 back then…
I think with a Raspberry Pi or similar system you could build something very interesting today with a much better user experience
I am typing this reply on an 17 year old PC that works absolutely well for any day-to-day task. A PC that can run Windows 10 happily.