I sent a suggestion to Apple 2-3 years ago where I suggested they do this, but in reverse.
The "dots" should be cheap, distributed around the house and assigned a location (kitchen, bedroom, office, etc), stay fixed and instead used for tracking your iPhone (or rather, have the iPhone "ping" them) in order to determine your iPhone's location within the house.
That would revolutionize HomeKit, as now you could say commands without *always* specifying a location.
You could just say "turn on the lights" and your iPhone would use the dots in order to determine your exact location within the house and magically turn on the lights in the room where you are