The University of Glasgow brings us a totally new kind of interface, to check for example the SMS inbox and power level of the mobile phone without looking at it.
By shaking the cell phone the mobile phone generates audio and vibration.
So it can give the feeling of small balls bouncing around inside of the phone. Each ball stands for one SMS and different senders generate different timbre (wooden or metallic balls). By shaking the phone, you can easily check approximately how many messages there are in your inbox and how important they are.
Another scenario is to check the power level of your phone by shaking it. Your phone feels like a bottle filled with water. So when the power level is low, it sounds like a bottle with little water left.
Check the video to get an impression of this new interface:
This interface is very intuitive, because it takes elements from the real world (balls in a can or water in a bottle) and uses it as metaphors for virtual items (SMS-messages and power level). This takes user-interfaces one step further. We already know desktop metaphors (for example: images of folders represent the datastructure "folder"), but these new metaphors combine audio and tactile feedback in a way that lets us experience interaction in a more natural way.