Much like many people may not have foreseen the implication to human development after the invention of the wheel, I believe we have hardly scratched the surface with smart phones, in fact we need to find a new name like personal assistant because phone is but one of its uses. The keywords here are; productivity and mobility. look at this scenario: you have just bought a piece of land. Instead of walking aimlessly and trying to know your boundary, you pull out your phone and call up google maps. mark specific spots on your map and get exact GPS readings. snap a few pics and send all to your landscape artist and architect. 5 years ago, this would have needed a very expensive professional.
You no longer need your wife to hand you a piece of paper every other morning for the grocery, she only needs to update a grocery notebook in her Evernote which she shares with you and also puts a reminder in a shared calendar.
As much as news papers still look logical, try finding them 20 years from now.
Ask yourself why you need multiple remote controls for your gadgets in the house further hoping that you understand that remote control is not limited to TV and radio but, in the future, will extend to lights, security, stove, bath tub etc.
Many people think it is impossible for Econet to go beyond 12 million subscribers in Zimbabwe forgetting that soon it is going to be necessary to connect to our homes, cars, fridges etc while tele density will need to be redefined. While all this unfolds, notice how the smart phone will remain central to all this.
And if you still think schools and institutions will continue putting up important notices up a notice board, you still don't understand the potential of a smart phone or like I prefer to call it, personal assistant.