For those who are price sensitive like me but want all our macros; my personal app also scrapes the flyer for local grocery stores for ingredient prices and runs a knapsack algo to reach my cost threshold and tells me what things I can make
Probably for its homomorphic encryption properties. Used in the correct setting with the appropriate Generator ( ElGamal on Elliptic Curve Fields) it is very secure but limited in use beyond Set Intersection as the results cannot be decrypted.
I think ultimately the price will be determined through government subsidies. Current Meat and Dairy Industry receives massive subsidies (~38$Bn) and the lobbying groups won't appreciate a cut of profits.