You know if you expand this technology, adding obstacle avoidance, the ability to track GPS enabled transponders, the ability to manage and override the drone along with transmiting the video, it would enable fantastic coverage of events like the EWS.
Usually coverage of these events is very spotty with only the occasional cameras/cameramens available.
However if the people covering an event had the ability to tell a drone to follow a riders just by telling it which transponder you want to follow that would allow for great coverage.
Select a riders transponder, drone finds and follows the rider, then when you want to follow another rider just tell it to go follow another riders transponder, drone flies up away and finds the appropriate transponder, all while transmitting the video back to a base station where the operator is sitting.
There are some safety considerations to take into account, but people are working on those.
The main thing holding this idea back is flight time.
Also riders transponders would need to be very small, light and robust.