Apple has published a new patent today, one that takes the possibilities for future iOS mobile devices and adds a whole heap of abilities seemingly ripped from sci-fi thanks to flexible display technology. Some of this we’ve seen before: tactile keyboards that essentially rise up to meet your fingers have long been a theoretically possible addition to screens, and there’s been talk of Apple using them in the past. But a display that’s also a built-in surround sound system? That’s new.