Honestly that looked about 10x more useful then any other feature the iPad has. Too bad it was a joke, they were actually going somewhere with that!
Are you all sure it's a joke? Thinkgeek is selling them at the price they listed in the article: ThinkGeek :: iCade - iPad Arcade Cabinet
You mean like multitask? An almost standard feature when it comes to these kinda things? Nope, no it does not.