"A new touch screen can transform its flat surface into real physical buttons for smartphone or tablet owners. The morphing screen technology could give mobile device users a keyboard experience on demand, but without entirely losing the smooth, flat touch-screen surface.
The interface uses micro-level control of fluids to raise buttons or shapes of different heights, sizes and firmness — and can make them disappear just as quickly. Such a panel normally appears as a flat, transparent surface that can easily replace the standard touch-screen displays on existing smartphones, tablets, ebook readers and handheld gaming devices."
http://news.yahoo.com/touch-screen-m...215123550.html
maybe this could someday lead to things like braille ereaders.