I actually implemented a nearly identical system for my senior design project, except we targeted the smart home ecosystem. Basic use cases would be automatically turning on/off lights or having a music stream/temperature preference/... follow you as you move throughout your house and enter/leave rooms. All implemented by an app on your phone detecting strategically placed beacons.
Haha I did a very similar thing for mine - it was using these to replace clock in systems for hourly workers, no more need to clock in or out, the app would auto detect when you entered/left the building
