It would be great to have someone couching you on while in a workout. I imagine they would also be intelligent to understand where you are on a route so that they could prepare and couch you through the circuit.
If it were a real person or at least realistic enough to fool me in my oxygen deprived state then that would be great. In the past, if a coach told me to run through a wall I would run through a wall. However, if it’s not done well enough it would just be weird and distracting. Wait until it can be done right.