Can't see it happening for a long time. Improvements in gyro's and other radio control tech has made them possible but they still have to be piloted. Only any good all the time you have good line of sight and a good perspective view.
Current drones are designed for shooting static or slow moving subjects.
A lot of the shots from drones at sporting events aren't actually drones but cameras fitted to wires or long arms.
Imagine what would happen if one got out of control in the wind on the mountain!