As an example of another approach that doesn’t need the intermediate csv file and has a much cleaner “refresh”, I made an adapter plugin that accesses real-time robot data via ROS: https://github.com/locusrobotics/qgis_ros
The ability to extend QGIS because of the C++ and Python APIs is immensely powerful.
Can it send commands back to the app from which it's receiving position data? Things like pause/play and adjusting the time being displayed?
QGIS is kind of the go-to app if you want to do serious geospatial data analysis. As for _visualization_, I'm not sure. There's probably better options for many domains. For ROS there's RVIZ, but the ROS community's spatial analytical tools are fairly immature.
If you could however do some number crunching using historical data to display things like average air traffic density and routes, it might become useful.
It's a bit bewildering that there hasn't been any traction for the robotics community to use more GIS. It's a match made in heaven.
There's examples in the presentation linked in the git repo if you're interested.