So we now think the 7S/7S+ will have glass backs, allowing for inductive charging. They will also likely have Touch ID, which the 8/Pro may not have. It seems likely the 8/Pro will likely reintroduce Touch ID next year (Touch ID has spread across the iPad and Macbook, so I don't really see Apple abandoning it). The 7/7S+ may actually be pretty big upgrades. What if the 7S/7S+ have some other, hook feature that is left out of the 8/Pro?