In his blog at the Chicago Sun-Times, Roger Ebert pans a new technology for movie theaters:
"Move over 3-D, here comes D-Box!" says the article by Dan Craft. "Instead of delivering movie thrills straight between the eyes, D-Box lifts and separates, so to speak -- detaching the moviegoer from his or her seat via three levels of pitching, rolling and heaving. "Moreover, the moviegoer also has control over the intensity of that action, via a control knob that can reduce the movement, or, if it all becomes too much, shut it off."
The D-Box seats also (surprise!) involve a higher charge of about $8 to the moviegoer. Further details at the link, where there is also a video history of "Smellovision."