Another way to think of this is that smart phones or pocket computers connecting the next two billion people to the internet is similar to what the Gutenberg Press and the Bible were to the masses in the Middle Ages. Before the Gutenberg Press, knowledge and control of the people was in the hands of a select few who controlled the flow of information. As a result, they lorded it over the populace and made them beholden to the church or more educated authorities who ruled them. But once the Bible and other documents could be dispersed to a larger audience, those authoritarian rulers were challenged and eventually marginalized as more and more power went to the people over time.
Steve Jobs was wrong. The iPad isn't the most important thing he has ever done; the iPhone is.
And Samsung was right. The next big thing is already here — smartphones.