I saw this online earlier myself. My question that jumps out immediately is, what would be the reason for the iPhone to be created into a curved shape? Is it just a new look, more icons on one page, or is there an even better advantage to this "possible" curved iPhone that is rumored for in the future?
I was raging that Apple has kept the same size screen since 2007, only stretching it slightly with the 5. Those larger screens were so seductive, yet Apple insisted on honoring the Steve Jobs edict of a relatively small phone. So I bought a Nokia Lumia 928. What I learned was that the extra screen real estate came at a price: less one-handed usability. While it's a beautiful phone, it's just not as pocketable or as easy to use as an iPhone. And WP8 is a far cry from iOS.
I'd go for a 4.7" iPhone provided they do what Motorola did with the Moto X and eliminated the bezel at the sides, making the screen truly edge to edge. The Moto X is the same size as my iPhone 5s with a slim case. Very seductive. I'm a Mac user and I rely on the integration with iCloud to keep all my databases in sync. I'm seriously tempted to try a Moto X, but the rumor of a larger iPhone is giving me pause.
People always think that ALL people put their phone in their back pocket, which is why they say that "You should be careful when walking in public." I keep my phone in my front left pocket. OK I have said too much now.