Apple newest patent describes a device with force-detecting flexible OLED display
The USPTO revealed a new Apple patent application (#306554) that describes a device with a flexible OLED display (the patent application specifically says it's an OLED) that can detect when force is applied - which means that you can press the screen as part of the user interface.
The force-measurement layer, which will be placed on top of the OLED (or embedded inside the OLED panel itself, like the touch layer in Super AMOLED panels), will track whether the panel is being flexed using magnitude detectors such as strain gauges and optical sensors.