Lab-grown meat (and presumably lab-produced milk) are going to be a different sort of product than Morning Star patties or Pea Milk. Lab-grown meat would be meat, not merely some thing that is vaguely meat-like.

I really like soy milk and almond milk, but they remain twice as expensive as milk and distinct in taste.

I'm not sure anyone thinks that lab-grown meat will go through the roof if it's not cheaper than farm-grown meat.