Well, he has a point, but I wouldn't call that visionary; many people have suggested before the possibility of a future where an important part the connected population never used a PC before and rely exclusively on their smartphones. And understandably so, the only way companies like Facebook or Google can grow is by getting the "remaining" population online, and that in turn might be enabled with the advent of the cheap smartphone. Of course whether it will happen and what would be the impact if so are different questions.