I doubt whether we could sustain the world's population on meat – at least not meat which I would like to eat. It certainly bears reasoning that any party which demands compliance would also prefer its subjects to be fed on vegetables.
At some point I think either lab-grown meat, or sufficiently realistic synthetic "meat" will become cheaper to produce than the real thing, and real meat that has come from an actual animal will come to be seen as more of a luxury item. There are other factors that can accelerate this trend, health concerns, climate impact, etc, but price to the consumer will be the fundamental driver. Would you pay $2 for a fake or lab-grown steak that is 99% realistic, or $20 for the actual thing?
for years people paid for cheap walmart(asda) economy 'basics' meat.. but more recently people are prefering to buy the more organic premium meat.
i personally stay away from the cheap own brand crap. their ready meals taste of cardboard and their 'basics' range of frozen meat is tasteless..
i prefer a real joint of beef or real fresh chicken breasts from a proper butchers, even if it is a premium.
by the way. the 'lab' meat wont be producing a whole 'breast' of chicken it will produce chicken cell lumps which then become nuggets or chicken burgers.
you are not going to get a 'lab made' T-bone steak. but you will get lab made burgers