Knowing how long it takes for Apple to bring products to market, and how Samsung tends to rush products into development: I wonder if Apple had been working on curved displays for years but never felt they were ready for production, whereas Samsung got wind of that and beat Apple to market.
I too don't see much value in a curved display (outside of an increased ability to break when dropped). But if the rumors are true, maybe Apple has found a compelling use for that design. I'm still having trouble believing that they're going back to an all glass phone, the most fragile product they ever made.