Nearly every rumor about iPhone 5 was true, and this is either because Apple can't keep secrets anymore, or it's because Apple is manufacturing them earlier and secrets are coming out of the factories. We haven't heard anything about the next iPhone yet, but Leo says we should know a lot more come spring next year.
Leo predicts the next iPhone will look exactly the same as this one, except it may have upgraded internal components. Smartphones have reached maturity, and there's really nothing more Apple can do with it. It is what it is.