By the way, these discussions, once again, are conducted amongst a highly homogenous group of people: see for example the participants in a NIPS panel on the societal impacts of machine learning (http://www.doc.ic.ac.uk/~mpsha/NIPS_Symposium_2015.html).
I am very concerned about the future of AI. Not because of the risk of rogue machines taking over. But because of the homogeneous, one dimensional group of men who are currently involved in advancing the technology.
Concerned AI researcher