Yep, it takes differential processing with a ground station to get the levels of precision that they are quoting. That and the GPS/IMU solution from the drone and gimbal. The ground station alone would cost a bunch more than any of our phantoms.
Interesting as there are no controller sticks or remote needed as it auto-runs itself off a area you circle on an iPad screen. The thing comes as a lease though starting at $30,000 per year and up.