I think it definitely depends on the persons needs. I use my phone for maps when I am going somewhere I am unfamiliar with. I use it for pod casts and audio books all the time. I use it for checking my bank account. Could I use something else to do these? Sure, but do I have access to all of the secondary devices to accomplish all of the above, not always. So yeah, the smart phone did become the catch all for a ton of daily processes, and I don’t have to carry 10 devices anymore.