The on thing that would catch the market out from what is being touted as a boring iteration will be releasing a 512GB iPhone 7 maybe for the top end/pro model? "Ah we got rid of the headphone socket but hey... we've given you loads of storage", might be enough to please the crowd. I see that dual camera needing a lot of storage and if that is the pro model people will want no question asked storage capacity on the go for long shoots. I would expect Apple might push the boat out with 1TB storage for iPhone 8 (again for top end model) but that is a bit away, I do think they may begin that process in earnest now. It strikes me as the one area Apple could out manoeuvre the market if they do it now regaining lost ground and would make a move to iPhone 7 more enticing for many. They then might also release larger iCloud data storage for free in tandem with what's coming for macOS Sierra and iOS 10.