Also, do you think a flexible screen will crack and shatter when you drop it like an iphone screen? -> Nope!

You may not use the flexibility in an obvious way, but you will want it for its properties, like taking falls.  Also, I’ve seen some sites working things like wearable screens (like a bracelet).  They would have to work out a way to connect from the screen to the phone though.  Perhaps the screens will become a bluetooth accessory to a block you put in your pocket.  Time will create the benefit…