Robotic Farms?

Technology Review writes about a hydroponics lettuce farm in San Francisco using robots to do some (much?) of the work.  I understand the logic, but as the article observes, such enterprises require a lot of capital upfront. Maybe there's a lot of capital sloshing around the world, enough to get a robotic farm up, running, and profitable.  We'll see. 

Part of the pitch for the robots is the difficulty of getting labor, especially with the current administration's crackdown on immigration.