Thin is more portable, but it can also be more fragile. Even if more perceived than actual, it is still real to the user. If consumers compensate by placing their new thin iPads in thicker portable cases, would such a consumer response indicate Apple miss calculated by going too thin? Thicker cases equal thicker iPads. Would Apple be better off staying thicker and adding more horsepower, if the end result is thicker cases equaling thicker iPads anyway?