Robot Thief

The military has been making increased use of robots to do battlefield tasks.
By far the most important have been UAVs (unmanned aerial vehicles) (http://en.wikipedia.org/wiki/Unmanned_aerial_vehicle), the Predator drones in particular.
Some have argued that it makes sense to get rid of fighter pilots and fighter planes, particularly expensive F-22s (http://news.yahoo.com/s/time/20080423/us_time/whytheairforcebugsgates) - basically, a drone is a lot cheaper (and a helluva lot more easily replaced) than either a fighter plane or a fighter pilot.

Then there are also the Foster-Miller Talons, which look m16s on tank treads: http://en.wikipedia.org/wiki/Foster-Miller_TALON.

Two cool new developments are the LANdroid: http://www.technologyreview.com/Infotech/20393/ - a robot which will be very important as military "Transformation" continues - and the robot thief : http://blog.wired.com/defense/2008/04/back-in-july-th.html

Will one day all wars be fought by robots? It sounds like a ridiculous question, but it is an interesting one to ask. It is certainly imaginable that more and more of the work will be done by robots controlled by humans outside of the theater.