The second camera is only supposed to show up on the larger iPhone model (the 7 Plus). But the smaller model will probably get some camera updates of its own, like image stabilization, which has been exclusive to the Plus model for the past two years.
Goodbye 16GB: I don't know that there's a new feature more deserving of a "finally!" than this. Apple is finally expected to stop putting 16GB of storage in its entry-level iPhones and instead bump them up to 32GB, according to The Wall Street Journal. That's a much more reasonable amount of space for 2016.
A clickless home button: Apple is expected to make a very subtle but very big change to the home button — it won't click in. That's according to 9to5Mac, which says the new button will be pressure-sensitive and use haptic feedback to make it feel like you're pushing it in, even though it won't physically move. It's a trick Apple has already pulled off on some of its MacBooks.
A blacker black: If there's one good reason to buy the iPhone 7, it may be this. After years of dealing with whatever that "space gray" nonsense is, some vague rumors have suggested that Apple is going to make a black phone again. Not totally, 100 percent, wonderful iPhone 5 black. But more like what the Apple Watch Sport uses.
Everything else: You know the drill. The new iPhones will of course be faster, with new processors, maybe more RAM, and something that gets described as "magical." The removal of the headphone jack has people suggesting that the iPhone 7 could be more water resistant, though it's not clear if the phone will actually be waterproof. The phone will probably get a little bit thinner, too.
Everything not: As always, there are a bunch of other sketchy rumors that pop up but seem like they probably aren't bound to come true. This year, that includes the iPhone 7 having a dual SIM tray, a blue color option, wireless charging, or a smart connector. It's possible Apple is looking into these things, but there hasn't been a lot of evidence suggesting they're happening this year.