I don't think it will be technology that changes the game. I think, given the shrinking number of hunters, shooters, places to hunt, places to shoot, the changing demographics of the country (especially when we grant citizenship status to people from antigun countries), things that I'm not permitted to say because it'll ruffle somebody's feathers, ad infinitum, ad nauseum.
I think the real game changer is going to be the abolition of private ownership of firearms. Innovations won't mean crap, because we'll be largely like the British, viz. only having a few types of innocuous firearms deemed safe by the aristocracy. And even then, we'll only be able to enjoy them under strict supervision. The leaders in both parties, demoRAT and Repugnant, are consistently moving toward a globalist "eutopia", in concert with the United Nations. And there is no place for civilian ownership of firearms in the New World Order.
I won't see it. I'm an old man. It's doubtful my children will see it. But I think my great grandchildren (who have yet to be born) will see it. I think it's much closer than we realize.