At Interaction 2011, a research group with members from Osaka University demonstrated the Paranga, a device which recreates the sensation of turning pages when using an e-book reader.
E-books are becoming popular, but the only feedback they give you is pictures and sound. For example, if you want to skip ahead several pages in an e-book, you scroll with your finger to the desired position. But the problem is, that's not very intuitive. The advantage of this device is that, when you skip ahead, it lets you know roughly how many pages you've gone by giving you a relevant sensation.