While he didn't know Facebook would pioneer it, Mark Zuckerberg says he knew that all software would be social.
While he didn't know Google would pioneer it, Larry Page said he knew that the fast growing web would eventually need a good way to search.
While he didn't know Viaweb would pioneer it, Paul Graham said he knew that ecommerce sites would eventually be created by software.
And so on....
I respect the fuzziness and path dependence of startup growth but boy do I respect people who can see the future now, make it happen and end up being correct. Even more props to people who make it happen multiple times [e.g. Joel Spolsky, Elon Musk]