You don't need to Socratic Method me---I know what you're driving at. If an average car costs $XX,XXX, and consumers accept that and are used to paying that price, I don't think there's a way in hell every car manufacturer out there is going to reduce its retail price to .8 x $XX,XXX merely because it no longer has to pay "hidden" taxes during production. You really think one car manufacturer will break ranks and discount their product that much out of good faith? If so, you have more faith in a businessman's "morality" than I do.
If your case prooves to be correct, how about you and I pooling our resources and starting a car manufacturing business? I'm up for stepping through the door that will be wide open for us, how about you?
Anyway, nobody will discount anything.
I don't see any reason for prices to change. Why do you think there's any reason for prices to change?