This has been tried elsewhere. The costs with hydroponics greenhouses are so high that it doesn't make economics sense to grow food, only much higher value crops like flowers.<p>Yet every few years someone comes along only to prove the economics don't work. Last I read someone was trying to get funding for a skyscraper hydroponic greenhouse in NYC which would be clear folly.
Without going all Matrix esq, this is fascinating.<p>1) The potential to grow food anywhere. ( Spaceships, submarines, cave systems )<p>2) From a green perspective, it would reduce many a carbon foot print in terms of travelling.<p>Still to conquer would be the electricity bill.<p>A country like Iceland tho, could become a major food provider with its almost free electricity.