From 13 September 2016 will be available the iOS10… also the iPhone7.
for specific information you can visit the Apple link: https://developer.apple.com/ios/
In few words there are some news, most important for me are:
1) API/SDK to integrae “Siri” in your application
2) Proactive suggestions: iOS 10 introduces new ways to increase engagement with your app by helping the system suggest your app to users at appropriate times
3) New speech recognition API
4) callKit API to integrate VOIP in your app
and other, that you can read at https://developer.apple.com/library/prerelease/content/releasenotes/General/WhatsNewIniOS/Articles/iOS10.html
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