I think the biggest obstacle we are seeing, and we talked a bit about it already today, is accessibility. How do we make it accessible to people? If your employer is providing it, or if a school is providing it, then you have that, but if they're not, then you need to be self-motivated to go out and search it out. That is the gap right now. Technology is built to scale, so it could handle hundreds of millions of users. It is really how we make it accessible and what's the right way to make that accessible to everyone.
On April 30th, 2013. See this statement in context.