At what point will dumb-phones no longer be considered dumb

Every day more and more consumers are upgrading to “smartphones”. Some knowingly, others because their friend’s friend has one just like it and they feel compelled to fit in. Will the time come when dumb-phones no longer exist? Even today if we evaluated the usage of the so called feature phones you would easily see that the majority of them can handle social feeds, email and more. So one has to question where is the line drawn when it comes to defining the categorization of mobile phones.

In the past these notions were always based on what operating system the phone was running. Now that this line has been blurred is there really a difference?