My view is its an LED.
Don't no why apple would care for shock aborbance! (sorry about spelling)
Maybe every single time Apple dropped their prototype, the screen shattered. We can't have that happening out in the wild. Everyone has dropped their iPhone at least once. I have dropped mine about 3 times, but luckily everything was fine. Now, if everyone drops their phone at least once and that one time it shatters, many people are going to be pissed.