Indeed, the economics of hydroponics would suggest that it should already dominate commercial vegetable production. The main reason they're not, is because municipalities greatly undervalue water, and because agriculture is so highly subsidized and so it's hard for hydroponics to compete.
1. Underselling water
Municipal water prices set by local government greatly undervalue the actual rarity of water. With so many aquifers running out, and rivers stretched to the max, especially in the west, I'm surprised there could be this much myopia on an issue that is clearly far more serious and immediate issue than energy. Right now the only pressure to reduce water use seems to be on consumers (watering policies, low-water use appliances), but they only use 11% of it.
2. Subsidized agriculture.
This is a more well known issue so I don't think I need to repeat it here.
1. Underselling water
Municipal water prices set by local government greatly undervalue the actual rarity of water. With so many aquifers running out, and rivers stretched to the max, especially in the west, I'm surprised there could be this much myopia on an issue that is clearly far more serious and immediate issue than energy. Right now the only pressure to reduce water use seems to be on consumers (watering policies, low-water use appliances), but they only use 11% of it.
2. Subsidized agriculture.
This is a more well known issue so I don't think I need to repeat it here.