New Scientist reports that a device was invented that lets you touch virtual objects using a floating touchscreen. Using ultrasounds the device created areas of pressure and your fingers can feel those areas as you feel the press of a button. Once you put your finger in a given position you feel the virtual button, but also trigger a command, in the same way you would do with a keystroke.
And all this is done using sound waves at high frequencies. Now, that is cutting edge science 😀 Yasuaki Monnai and his team at the University of Tokyo have created a virtual screen you can feel. Called HaptoMime, it uses reflective surfaces to create a holographic display.