Disaster recovery, assistance and space applications (asteroid mining?) are the only real applications of these robots. This is not going to be useful in the military. The only advantage it may have over humans is increased accuracy, and even then, a mobile gun platform on wheels will do a much better job. This robot is less mobile, less reliable, less endurable, much less smart and much less flexible than any averag…
Cheap, good humanoid robots will fill the slave niche in society, without the ethical problems (at least in terms of the slaves themselves - it might not be good for us to be slave owners, but we'll see how that pans out). Who said the researchers are or should be thinking about only this century?
By the way, a mobile gun platform on wheels is not going to be great in built-up areas. This is why we don't have combat soldiers fighting in powered wheelchairs, and why Daleks suck.