Hmm, I had issues with the verticality, but hydroponics can save a lot of water (regular greenhouses too, by capturing evaporated water; you can also use pots). Indoor heating, temperature control, and protection from hail also mean year-round production, or at least protection against random weather events. Greenhouses can achieve most of these already, with more efficiency gains if water cannot escape underground.

Verticality (including regular shelves on a single floor) is good for density (may be cheaper to build), but has energy density issues for some crops.