The world has reached peak agricultural land, so to feed an increasing number of people, will need to increase agricultural land efficiency (increased food production per hectare). This will likely mean less meat production, since meat production is not a maximally efficient use of land, in calories produced per hectare. That's certainly not a bad thing, as a mostly plant based diet is better for human health and the environment.

But, we have committed to a market based distribution system, so it's up to the invisible hand, which is not necessarily great at achieving maximum efficiency.