I came upon the Gray article immediately after reading the San Franciso Chronicle last Sunday, April 26th. The Chronicle's "Insight" section had an article called "Unconventional Weapons - Future War." That article discussed LAWs (Lethal Autonomous Weapons), apparently soon to be on the scene. I think it's pretty accurate to say that if you like militarized drones, you'll really love LAWs.
(1) - http://www.theguardian.com/books/2015/mar/13/john-gray-steven-pinker-wrong-violence-war-declining?CMP=share_btn_fb
(2) - http://www.sfgate.com/opinion/article/Rise-of-robotic-killing-machines-has-a-cautious-6219854.php