This is what OP is explicitly not asking for—it's just a demo of a theoretical case, Temporal showing how a company that's hyped up on AI agents could use your platform to do agent-y things.
OP wants to know if anyone is actually using this stuff productively, not if anyone has tech demos. We've all seen more than enough tech demos.
This is interesting stuff, and a great stepping stone. I think the excitement around true agents will come when the AI can author the workflow pipeline, so to speak, in response to a request.
This is an area where terminology is in flux but I think of weak agents as mostly-hardcoded, eg if you wrote a flight booking bot that can converse with you about flight options then go do the booking - but you specified the APIs and workflow engine. Strong agents can self-directedly follow long range goals over long time frames, eg “run this business unit for me” or “manage my portfolio”.