I wouldn't say soon, but probably within the next 100 years or so, farming of animals would have to still happen as it's a vital income for many and we need some way of managing our countryside, and animals are a good way to do that, doesn't mean we have to eat them but something has to be done with them. Plants would also probably need to be modified genetically so they can produce all the nutrients that we need from meat. It's not going to happen within your lifetime.