To the OP, we are not far from sensors that could look at an area of interest and identify animals within it regardless of the eyes of a human being able to find them with or without optics. Currently, such things would be cost prohibitive due to resolution, but it's all headed one way which is better tech and more accessible pricing.
So where do we draw the line? This of course depends on the state, but where it's at right now would be fine. No further. That of course, would mean many lines (archery fps and things, optics and things, guns and things). But anything that increases the efficacy of hunters (pump and well analogy) in terms of tools (I'm not talking about clothes) should have definitions drawn around it that ceases progression in the hunting world. This would be hard. Outside of mountain bikers, I can't think of a culture that obsesses over their toys more.
If I were king for a day, there would be a rollback. There's precedent for this in Montana. We have Weapon Restriction Areas. They are fantastic, and can absorb so much pressure relative to take and relative to adjacent areas. If hunters really wanted to hunt, I believe we could configure our hunting regulations in such a way that wouldn't require a reduction in tag allocation or days in the field. We'd just hunt with different weapons. That of course is a pipe dream, but in the same way the Unlimiteds of Montana have a lore about them due to both geography and opportunity, if, using and extreme example, Nameless-Range-as-King said all of region 7 in Montana was now primitive bow only, decades later that chunk of earth millions of acres in size would also have such a lore. A state could too.
Instead though, we'll creep forward with technology hopefully catching some of the egregious things (nightvision, drones, etc), and eventually all hunt less.