The final beta of iOS 10 has now been seeded to testers. The Gold Master version is what the general public will see when it launches. All of the features and everything will not be changed between now and then. iOS 10 is slated for a launch date of September 13. That is only a few days before the iPhone 7 launches, which will also ship with iOS 10.
To get the final beta, developers can go to Settings and get it from the software updates page. If you still don’t have iOS 10, you can download it from the developer center download page.