Gah! Read!
http://www.theinquirer.net/?article=9991
Quote:
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The piezo effect can be subtly altered to create a number of different vibratory effects, allowing humans to get the sensation that their fingers are actually touching real buttons on a screen.
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Well, would fall under the quote from my other topic about what's revolutionary about it: "It's nothing "new" technically speaking. It's just something that hasn't really been applied to video games yet."