I'll admit Hollywood and artists have given us some wonderfully scary imagery of the killer robots of the future:
http://static.guim.co.uk/sys-i...
http://ockhamsbeard.files.word...
But I suspect the real future will be more like:
http://www.wired.com/images_bl...
Or the much less vulnerable and maintainable:
http://eandt.theiet.org/news/2...
Coupled with thermal imagery, a simple AI to identify sneaking human patrols, and (at least at first) a go/no go command from some Private Tentpeg hunkered down in a bunker or OP somewhere. Trust me on this: I've BEEN that Private Tentpeg .. and later, his supervisor. It isn't far, in the front lines, from a tripwire connected to a hand grenade" to a much more complicated (and even more lethal) machine. How much "intelligence" will be vested in that machine is just a quibble. Trip wires aren't smart at all, yet we've never hesitated to use them.