iPhone 6s isn't even meant to be upgrade option for the current iPhone 6 owners. Rather than that it is intended for iPhone 5 and 5s users for whom last year's

iPhone 6s isn't even meant to be upgrade option for the current iPhone 6 owners. Rather than that it is intended for iPhone 5 and 5s users for whom last year's version was not tempting enough to switch. And also, it is just realization of the rule: "If you don't move forward-you begin to move backward"