The roll-out of this new GEO system was even discussed in local (Dutch) news. So it has impressed a number of journalists.
The restriction means that DJI sets a rectangular zone with a width of 1.2 kilometers for each runway. On either side of the rectangle there is a triangular zone where drones are not allowed to fly, because that space is used by aircraft to ascend or land.
To make this system operational, users must install an update of the firmware and use an app update. When I have understood the information on the DJI website, it is currently only for DJI Go 4 users.