100% coverage seems like an inevitability in a country where filming in public is a constitutionally protected right and networked ALPR capability is possible (if not regularly offered yet) in commodity doorbell cameras.
> filming in public is a constitutionally protected right As with everything, there's much nuance to this "right". https://consumerrights.wiki/w/Common_Questions,_Arguments,_%...
Imagining a universe where companies are also bound by that is an interesting thought exercise. Many products (cloud photo backup, foursquare style "check-ins," location sharing with friends, etc) would be simply impossible because the aggregated data amounts to comprehensive surveillance.