You can look at the history of margarine for a good idea of how meat may go in the future.
Margarine didn’t come about for health or ethical reasons, it came about because butter was relatively expensive, and someone figured out a neat chemical trick to turn liquid oils into solids.
Margarine largely replaced butter in many places. You usually had the option of butter, but it was more expensive, and was considered to be bad for your health.
I actually preferred butter to margarine, but except for special occasions or if we were baking something that needed the real thing, we went with the partially hydrogenated oils. When I became responsible for my own dietary intake, I pretty much stuck with butter.
Then it comes along that margarine is actually pretty bad for you. It contains fats that don’t really metabolize well in the body. It’s not poison, exactly, but I’m sure it can and will be linked to many heart conditions.
So people pulled back on margarine, and some products came out, like Becel (Promise for us USians), that did not contain those nasty chemicals.
However, it is more expensive. Still probably cheaper than butter, but more than it would be if it were made the old way. It is also not exactly sustainable, as it uses palm oil, and that’s a whole environmental disaster of an industry itself.
In the end though, my grocer’s cooler has probably three or four times as much plant based spreadable product as it has butter. They come in a wide variety of types and formulations, and most, but not all, are cheaper than butter.
But there is still butter.
I see the meat industry not necessarily ending up in a similar place, as I don’t think that the evolution of spreadable product from processed plant based oils is over, but I do see it going through a similar phase as it too evolves.
Maybe a hundred years from now, food that comes from killing animals will be very rare and considered to be barbaric by most, but I don’t see it going away entirely, and I think it will be a long process to get there.