HoloReplay for runners would be much more useful than the RoboPacers in their current form.
I imagine that adapting HoloReplay to runners will take a considerable amount of work, so I propose that in the meantime at least Zwift HQ make the speed of Run RoboPacers adjusted to incline to incentivise people to follow route incline (maybe this is a easy to do adjustment) as I proposed here. Run RoboPacers as they are right now are useless, we already have the treadmill to run a certain constant speed.
Anyway, I would definitely use the run HoloReplay.