Is there any cause for concern with scratching on the iPhone 6? I used to own an iPod Touch and I have had no problems with display scratching and just didn't use a cover for the front only. Does the same still apply now for iPhone even though it is not using sapphire glass? Should I be concerned if I don't want to get a case for it? Aside from keys in pocket, I'm not going to have any diamonds or sapphires lying around in my pocket where my iPhone sits.