The implications are far reaching beyond cell phones. any service that stores location data for it's user is subject to 4th amendment expectations _regardless_ of an opt-in. The court specifically rejected the argument that by opting-in the user is abrogating their privacy rights. If you centrally store location data you have an obligation to protect that data under the 4th amendment as private and would require a warrant.
The impacts here are with food delivery apps, fitness apps, weather apps, cloud services, ad tech agencies, data resellers/brokers, etc.
The impacts here are with food delivery apps, fitness apps, weather apps, cloud services, ad tech agencies, data resellers/brokers, etc.