It looks to me as a computer animated marketing tool for what "might" be available in the future. While DJI has advanced this hobby/industry, they have also contributed to the downfall releasing products before they are fully tested, supported and available. I own some DJI gear and like most of what I use but I don't care for their marketing of products that anyone can fly or that can fly by themselves. IMO that is why we have so much attention to the reckless actions of some with their "drones" like the Phantom's (full disclosure - I own a P2 but rarely fly it these days).
Watching the video, the actions of the drone flying through the trees following people looks too fake to me. Maybe I'm just old fashioned and prefer to fly my rigs using the skills I've gained through building my own crafts, this website and time behind the sticks, but to each his own. IF the X ever comes to market, I'm sure DJI will sell thousands, 100's of thousands even...