P.W. Singer gives a terrifying talk about the future of robotic warfare at TED. Here's a geeks-shall-inherit-the-earth quote:
The kinds of things that we used to only talk about at science-fiction conventions like Comic-Con have to be talked about in the halls of power and places like the Pentagon. The robot’s revolution is upon us.
If you don't feel like watching the whole thing, here's a Q&A with Singer that sums up the salient points.