It is funny how "Seamless integrate with social networks" is considered a huge feature in any product or service anywhere, and it is a just a button to share some link to Facebook or Twitter, where it will be totally uninteresting.
In the video it wasn't "a button to share some link" but it was a feature to search the social media and embed content in your "document".
And even if it supports simple sharing, I don't see why this would be "totally uninteresting [there]".
It would probably be more convenient than uploading a powerpoint file somewhere or creating a separate website.
/edit: OK, there are two different mentionings of social media in the video. The first is about embedding content of social media and the second is about sharing the content you created.
It's also about controlling what photo goes on social networks, what the default share text is, blah blah blah. Like it or not, that stuff drives traffic.
