With the iOS app ability to automate upon entering a zone associated with BLE device,
I think it would be nice to get an event every-time I enter / exit my car…
Apparently lon & lat are mandatory for Zone definition but my car has a funny habit of moving around 
In short - I’d like to be able to create a mobile zone around my car and take action based on coming near / going away from where ever the car is.
It would be nice to have a Service to Update a Zone’s location (like “Home Assistant Core Integration: Set location”). This would be very useful for “Mobile-Zones” like Cars, CamperVans, Boats and Stuff.
I think a easier implementation to get the same result would be to allow proximity sensor to have device tracker as the zone.
That way the car is a device tracker and the proximity will be the distance between you and the car.