iPhone - What's next?

Just for fun. I was wondering what Apple could possibly do next for the iPhone. It's already fast, already has LTE, already super thin, already shoots 8MP photos with HDR and 1080p video at 30fps. Already has a bigger retina screen.

So what could they really do to improve this thing besides just a faster chip?

The only things I can think of right now would be H.265. Possibly 4K video recording or 1080p at 60fps. I assume a 12MP camera is coming eventually.

Thinner isn't really needed. They can only really go as thin as the headphone jack will allow.

I would like to see iOS 7 get a new interface, widgets would be nice. iOS is getting a tad boring.

What do you think? What's next?