One peculiar detail that gets brought up in those discussions from time to time is a call for better security. It seems like many of Apple’s users would love to get better features for protecting their data and the safety of their devices, continuing the trend that Apple already set with the fingerprint scanner.
Other companies have been taking even more creative approaches to this problem, with additions like an iris scanner popping up to some smartphones lately. Apple might want to revisit their designs and revive that old creative approach of theirs if they want to stay relevant.
But the company is generally known for innovating very actively, so if anyone could come up with an interesting idea for improving the overall security of smartphones, we would expect that to be Apple.
In any case, we’re most likely not going to hear anything about the iPhone 7 on the official front for a few more months, as Apple don’t have the habit of hyping up their releases a long time before they are out on the market. It will probably be at least half a year before official discussions start, and by then fans will probably have come up with even more interesting and unusual ideas for what Apple can do to improve the quality of the iPhone and iOS for their upcoming release.