At the moment it is unclear as to how durable such devices are, and realistically in day-to-day use, how well these displays will hold before they break. The good news is that according to a report from Bloomberg (via MacRumors), Samsung could actually be offering buyers of the Galaxy Fold free display replacements.
Typically when it comes to display replacements on regular smartphones, unless you purchase some kind of special insurance or warranty plan, you would have to pay for a display replacement in the event it cracks. However with the Galaxy Fold, Samsung could be looking to offer its customers a free display replacement in the event the display ends up cracking due to repeated folds.
It is unclear if this will be applicable outside of the warranty period or if it could be offered for the device throughout its lifespan, but we’ll have to wait and see. At the moment based on Samsung’s tests, they found that after 10,000 or so folds, a crease could appear. The company is currently working on trying to make it more durable ahead of its launch.