I forsee a future with two categories of meat: "cruelty free" and "contraband", with a voting majority viewing the latter as one small step removed from serial-killing.
Actually forsee, and don't particularly wish it was so.
It's like when cars got seatbelts. First they were a good idea, then they were the law.
It takes 20 years to completely turn over the most culturally productive sector of society. Children will grow up in the world described by maxklein - and I guarantee they will ask why cows and pigs are still dying. (There will be an element of spite-the-rich hiding under the high moral tone.)
Twenty years after that, "abbatoir" will be a word that lives in history books - and in horrific news stories of police raids on black-market Mafia farms.