Say you're waiting for a plane, and you want a snack. The purveyors of $7 hamburgers have closed for the night. There's nothing but vending machines, offering the usual fare of candy bars, chips and soda.
But there, glowing between the more conventional vending machines, is something different. "HOT FRIES IN 45 SECONDS," it promises. "French Fried Potatoes. Hot, wholesome french fries straight from the oven!"
Feed in five quarters and stand by. Soon, there's a fat cup of very hot, very fresh fries. In cut and taste, they're remarkably like the ones you get at McDonald's.