Not that we should be texting in class, so it's definitely not designed FOR that, but it has more practical applications, too. Like, when you're cooking and your hands are full. If you want to reference the recipe, just swipe your finger across your thumb and you can interact with your device without getting pasta sauce all over the screen.
The device is being developed by researchers at the MIT Media Lab, who envision that the wearable technology could be extremely personable and therefore feel more like an extension of your body. They're even working on custom designs so you can still express your personal sense of style while you're wearing the device.
No word yet on when we'll be able to get our hands one of these awesome devices, but we'll keep you posted using our [now totally outdated] regular mice and trackpads!