iPhone 7 Plus sort of interests me, ONLY if iOS 10 is a major overhaul. Allow some sort of customization Apple already, it's 2016, not 2008 anymore. The same homescreen full of app icons, like the app drawer was left permanently open, and the same animations for like 8 iPhone generations is a frigging joke already. And not being able to drag down a specific app icons and place it anywhere on the screen, are you kidding me ? How bout widgets on the home screen already ?
So if iOS 10 is just more of the same of iOS 9, I will for sure pass on the iPhone 7.