Don't assume that the robotic solution will look anything like the human solution. A fitbit does not look like a "robotic personal trainer" and a roomba does not look like a person with a broom.

I would speculate that the obvious next wins for fire-fighting are drones to visualise the scene from multiple angles, remote control or self-aiming hoses and extinguishers. And various hardened eyes and arms to reach into the fire. All with human oversight, but a reduction in the number of humans involved or in harm's way.

This reduction in manpower is the pattern - e.g. supermarket self-checkouts still have some human staff, but to troubleshoot and supervise.