As touch screen technology evolves, things that used to be useful for relatively few will find new applications. One such development is the support for tactile feedback. These so-called haptic displays don’t just display an image and allow you to interact with it, they also let you feel it. Running your finger over the screen of your future iPhone will not feel like touching a slightly warm surface of glass. Instead, you will be able to feel the things displayed on the screen. This requires us to find ways to convey information using touch alone. The Braille tactile writing system is one potential solution.
