8ball
Check your privet hedge
And this whole 'they're going to be too fragile' argument seems pretty flawed too (even though you don't know anything about the hardiness of thee new foldable screens). People will always break screens. Some gadgets are more fragile than others and you have to treat them accordingly or stick them in a case. It's that simple.
These are just basic engineering principles.
We'll have to see how well the challenges have been overcome, but the touch screen material needs to be a lot softer than the types of glass in current phones. Maybe less prone to catastrophic failures like shattering, but more abrasion prone.
As for sticking it in acase, I wonder how thick that will make the things. The case will need more hinges etc.
These screens are going to be great for all sorts of wearable devices, though, if they can be made cheap enough.