Lasers:

And then there's this thing, which the Korean military is preparing to deploy. It's both a deterrent and a decent guess about what our future robotic overlords might look like:

TechEBlog passes on:, "The South Korean government plans to deploy these friendly reminders on the border between South and North Korea, to further ease relations between the countries". Well played.

References:
* Feature: 5 Future Military Technologies [TechEBlog]

Previously:
* Bad Week For The Future Of Humanity. Great Week For Future Robotic Overlords.
* Video: Giant Sword Armed Wii Controlled Robot. What Could Go Wrong?
* Bad Idea Very Bad Idea