The primary advantage of the Wright brothers' "wing warping" was low-speed maneuverability. The smaller the control surface, the more airspeed you need. For the Wright brothers, virtually the entire wing was a control surface, so they were able to control their aircraft; Richard Pearse [0] used ailerons for his flights earlier in the year, and had only minimal control.
The reason wing warping isn't used much has little to do with the Wright's patent. While many pre-WWI aircraft used wing warping (such as the Etrich Taube [1]), as airspeeds increased, smaller control surfaces became adequate, and the lower strength of warpable wings doomed them to obsolescence. The F-22 Raptor [2], a modern highly-maneuverable aircraft, has control surfaces all over its wings, giving it all the advantages of wing warping without the disadvantage of reduced wing strength.
The particular UAV in the article is a plane shaped like a seagull. I doubt speed was requirement. The fact is aircraft have gotten faster since the Wright brothers and airframes have also gotten much stronger. Ailerons with ailerons you gained high-speed maneuverability at the cost of low-speed.
Since then, engineers have been trying to find more elaborate ways of regaining lowspeed flight maneuverability by adding more control surfaces. Flaps, for example extend the wing to increase the chamber. It might not be warping in the traditional context but they have definitely warped the airflow to the same effect.
The reason wing warping isn't used much has little to do with the Wright's patent. While many pre-WWI aircraft used wing warping (such as the Etrich Taube [1]), as airspeeds increased, smaller control surfaces became adequate, and the lower strength of warpable wings doomed them to obsolescence. The F-22 Raptor [2], a modern highly-maneuverable aircraft, has control surfaces all over its wings, giving it all the advantages of wing warping without the disadvantage of reduced wing strength.
[0] http://en.wikipedia.org/wiki/Richard_Pearse [1] http://en.wikipedia.org/wiki/Etrich_Taube [2] http://en.wikipedia.org/wiki/F22_Raptor