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And it'll be vat-grown protein. Sure, there'll be problems with ramping up production, but from a cost standpoint, there's no comparison. We as a society love cheap meat, and we can't really push living animals much further. Vat-grown protein needs no feedlots, produces no fecal matter, doesn't waste nutrients on eyes, horns or feathers. The process could possibly be sterile from one end to the other. Vat-grown protein will spawn its own set of problems, contaminants and health issues, surely, but for factory food production, this is the wave of the future.
I realize that lots of people react horrifically to the idea of fake chicken and ersatz beef, but if it makes Taco Bell cheaper and safer, most people aren't going to care.