In an interview with Wired, John Bayne, Corning's head of Gorilla Glass, said that the company is "working on ultrathin, bendable glass that's 0.1 millimeters thick and can bend to a 5 millimeter radius", but that it would only be usable on smartphone displays in two years' time.
While there were no hands-on experiences with both the Galaxy Fold and the Mate X, let alone any details regarding the durability of those foldable screens, we do know that these rely on plastic polymers that are prone to scratching and are possibly not as good as glass covered screens on the usual flagship smartphones.
According to details it provided, Corning has already sent out functional glass samples to customers but these are not meeting all requirements, while you can get better durability or a tighter bend radius, it is quite tricky to get both.
Hopefully, both Samsung and Huawei will eventually get those foldable smartphones in the press or in customers' hands so we will be able to see how durable is a foldable screen and which solution is better. But it is unlikely that these displays are really durable, especially in Huawei's case, as the Galaxy Fold screen will be somewhat protected due to its design.
Other smartphone makers will eventually hop on the foldable bandwagon and it is good that Corning is looking into it as Gorilla Glass has a good track record in keeping glass screens and backs well protected.