Currently Locus is missing simple feature for live tracking assets. There is live tracking for yourself, but there is no matching service for tracking changing coordinates taken from external services using GET/POST methods from track service provider.
I would call such feature a fake gps, or external gps.
Its good subject for a plugin.
Locus has potential to be used in professional services to display assets on a map instead of using Google Maps, openstreetmaps etc. And Locus is ready, it can be easily displayed on large screen (pinned on a screen). Think about all these services like shared bikes, cars etc, which could be layered into Locus.
* possibly there IS a method to do this in form of WMS map, API etc
* there might be low demand, contrary to my opinion.