I think winning over meat-eaters is the key in the clean meat technology. Even if you become a vegan or vegetarian, others will still consume a growing amount of meat. Harassing meat eaters isn't the solution. The solution is to give them an alternative that's at least as good. "Good" from the perspective of a meat eater here, not from a vegan/vegetarian perspective. And here, clean meat is the solution.
I don't think that meat should ever be banned but we should raise the legal bar of animal husbandry to ethical levels, once clean meat becomes effective enough.