For the first time we're allowing developers who don't work at Facebook to develop applications just as if they were. That's a big deal because it means that all developers have a new way of doing business if they choose to take advantage of it. There are whole companies that are forming whose only product is a Facebook Platform application.

When we are thinking about stuff like embeds, we are not thinking about how we are competing with YouTube. We are thinking about how are we going to make it more useful for people to share stuff on Facebook.

We're going to build a better product than everyone else because we're going to get it out first or early. We're going to have a good feedback loop. We're going to get a bunch of feedback.

One of the big themes for the next chapter of what we do is I want to be able to build what I think are the ideal experiences, not just what you're allowed to build on some platform that someone else built, but what is actually, if you can think from first principles, what is the ideal social experience.

We're very focused on making News Feed really good, making our photos experience really good, making messaging really good, and creating great location apps. That's the nature of a platform business of our scale. Most companies that are relevant to us will have some overlaps in some competitive way.

VR is a very intense visual experience and having the most powerful PC is the only way to deliver certain experiences.