Ask HN: What new startups will be enabled by gigabit Internet connections?

I think it's feasibly that in a decade a large portion of the population in the developed world will have access to Google Fiberesque internet speeds (1 gigabit/s or greater).

I was wondering what types of startups might arise in that situation. What kinds of businesses are currently limited only by the speed of internet access?

I thought of a couple of things (truly immersive virtual reality massive multiplayer games, iTunes for HD movies, etc.) but I was curious about what other ideas might become reality with really fast internet.