The curved edges were the precursor tech to having a foldable screen. No matter what is said about the Apple vs. Samsung debate, Samsung is still the one responsible for the praises on Apple’s screens. They have tried with other manufacturers and providers but can’t escape the fact that Samsung is still the major leader on displays as they dump a shit ton of money on R&D on all LED screen technologies, specially manufacturing at scale. If you want high end screens, you just go with Samsung, period. The alternatives are constantly playing catch up with them and they are actually experimenting and trying to come up with new and original stuff. LG and Sharp are also really good, but their screens aren’t as premium as Apple wants them to be, though they are more affordable.