Except that smart phones already had a concrete use case beforehand (web browsing/checking emails on the go, instant messaging + phone calls) which only got bet

Except that smart phones already had a concrete use case beforehand (web browsing/checking emails on the go, instant messaging + phone calls) which only got better with advancements in technology (ie, iPhone). This is putting the cart before the horse. There are no great applications on phones that would be improved with new hardware nor are there unique applications that can only be done on the hardware without the phone.