Meat Plants

Eventually we will be able to produce genetically engineered plants whose fruits (or tubers) are made of meat.

There should be enormous economies involved in growing meat on the vine rather than on the hoof. A one-stage food production regimen should be more energy-efficient than a two-stage scheme (grow food, feed food to secondary food). Also, orchards are much easier to keep than herds, and can generally be grown on much less land. Even picking fruit is a more pleasant activity than slaughtering cattle.

This should overcome the objections of both ethical vegetarians (who won't eat animals for sympathetic reasons) and environmental vegetarians (who, as noted above, don't like wasting natural resources to inefficiently convert one food source [corn, etc.] into another.) Of course, ascetic vegetarians (who don't eat meat for reasons of spiritual discipline) and picky vegetarians (who just think meat is yucky) will not be converted. (For them we have Vegi-cattle, GM animals that grow fruit & tubers.)