Your points about non-meat animal products still very much hold still. Pigs would be pets and sources of organ scaffolding for humans.
Additionally, the yearlong production of milk in animals requires contant pregnancies, so will still cause many animals to killed. For instance, goat milk products kill far more male goats than any demands for the meat.
There are multiple types of vegetarians. Ones who dislike the moral part of meat will not have an issue with the new meat. There are energy consumption vegetarians. If this new meat is considerably close to the energy requirements for a vegetarian diet, they may go for it. The health vegetarians who are afraid of adulterated food may go for this meat now, but the ones who are afraid of the general higher cancer risk from red- meat based diets, etc, will likely not be persuaded to change.
As a vegetarian, I'd eat it, but hold off for a while atleast to look for potential health consequences. I'm not too worried about nutritional imbalance because I don't think this will ever be my primary source of nutrition.
As someone who gave up non-veg food about 15 years back, I'd welcome lab-meat since it avoids killing animals. However, whether we would adopt it ourselves seems to be irrelevant. I, for one, would not like to cultivate the taste for meat again. As an animal lover, I'd certainly not like to see menu items like "Synthetic dog meat, tastes just like puppies". Going to the extreme, replace dog and puppies with human and babies. I'll stick to veggies, thanks.
Additionally, the yearlong production of milk in animals requires contant pregnancies, so will still cause many animals to killed. For instance, goat milk products kill far more male goats than any demands for the meat.
There are multiple types of vegetarians. Ones who dislike the moral part of meat will not have an issue with the new meat. There are energy consumption vegetarians. If this new meat is considerably close to the energy requirements for a vegetarian diet, they may go for it. The health vegetarians who are afraid of adulterated food may go for this meat now, but the ones who are afraid of the general higher cancer risk from red- meat based diets, etc, will likely not be persuaded to change.