Clearly, they've never been to a Meatloaf concert.
One somewhat practical application, they say, might also be for game play, where, say, a shooting game could be programmed to release the smell of gunpowder. Or a driving game might enhance the experience with burning rubber.
Come to think of it, maybe even World of Warcraft could be designed to smell like your mom's basement. You know, just in case you happen to emerge from the darkness to play the game somewhere else.
Not that you'd want to.
At least it has indoor plumbing.