I just finished reading about a robot that is currently a prototype to possibly eventually replace soldiers. It can travel around at about ten miles per hour, and it has a machine gun mounted on its top that fires at a blazing rate. This robot is currently being developed by a team of engineers for a company called Robotex, and the prototype looks pretty impressive to me.
They have raised money from a group of investors instead of from the government, and it looks to be working for them. It would appear that way to me. There are more plans of improving this robot, but the difficult part will be getting the government to buy these things. They cost around thirty to fifty thousand dollars apiece, but they may be able to replace soldiers in the future. People have always imaged replacing soldiers with robots, and it may be happening soon.