I'll give it to phinz, since you can burn wood pellets in it, but the main thing I was going for was that it uses corn as a fuel. It can also use wheat, wood pellets, etc., but corn is the cheapest fuel that burns in it (I specifically looked for a corn-burning stove to use here). This particular model pushes into a fireplace or you can put legs on it and use it free-standing.
No guesses at all? I can pretty much guarantee that most people have had exposure to, or seen, a device that serves the same purpose as this. People have been searching for a better way to do what this does for a long, long time. This one is pretty ingenious.