I get the "simplify to improve the user experience" design strategy and respect it greatly but this one is hard to comprehend. If battery life is one of the main concerns of every phone user, why take away a component like the mechanical home button which no one ever complained about? And substitute it with one that will take "valuable real-estate" and then suck battery juice just to behave like the mechanical button you had in your old iPhone? And this happens to be a part of the phone which you interact with A LOT. The only reason I can come up with is marketing novelty only and lack of other innovation. Sounds very avant-garde but how is that ever going to benefit a user? Apple did mention it is going to be customizable but if you can turn that part of it off, that would be pitiful.