>substantially cheaper price
why substantially cheaper? Break-even would be fine too, no? And as a plus, lab-grown meat is much more ethical.
I also think that replacing 'cheap' meat like ground beef would already be sufficient and would make a huge impact, there is really no need make it difficult for ourselves and try to replace rib-eye.
Maybe there's something about lives being taken to provide the food that appeals to certain people.
I don't think most people are going to grab lab grown out of the grocer fridge if normal beef is available for the same price. I know I would not. But if its 25% cheaper I'm happy to try it
For me, it would have to be mass produced and about an order of magnitude cheaper.
I'd rather not be testing/tasting experimental lab stuff. And mass production bringing down the price with economies of scale is the real proof that the technology is ready.