The vote for Proposition 12 means that by 2022 egg-laying hens will no longer be confined in cages. Egg-laying hens, breeding pigs and calves raised for veal will now be given move space to move around. (Still, note that this only applies to animal-derived food sold in California.)
Make no mistake about it, it is impossible to raise tens of billions of animals for slaughter without causing enormous suffering. Still, this new law is an improvement.