Key points from article :
UN held talks on lethal autonomous weapons systems in Geneva last week.
Some countries want treaty to ban fully autonomous weapons systems.
Would prevent development of weapons which can act without any human oversight.
Advanced military powers including US and Russia blocked progress.
Yet to agree on definition of what a lethal autonomous weapons system is.
Campaign to Stop Killer Robots hopeful an international treaty can be reached.
Austria, Belgium and China recently joined support for an outright ban.
