Came here to say this. The implications for food security would be massive, but it would also have an enormous impact on climate change, cutting GHG emissions by one-third.
I don't follow news on alt-meat super closely, but I thought the scalability thing was not much of a concern, and I thought we were mainly at the steps of raising demand and meating or beating price parity with the real thing.
Something like an alt-meat only fast food spot or something trendy that can only be done with lab created protein could be all it takes to cement its place in society, so I feel we're just waiting for that tipping point due to product that mainly already exists.