> The Midwest in the United States has close to 90M acres of corn, 85M acres of soybean, and 30M acres of wheat.
Maybe I've got this entirely wrong, but my understanding is most vertical farming focuses on producing highly perishable fruits and vegetables which often still require a fair amount of manual labor and where being close to market is a benefit.
I haven't yet seen large scale vertical gardens being commercially successful yet, but if they do, I'm certain they won't be producing corn, wheat, or soybeans.