Robot dogs

In 2007, Boston Dynamics created the most advanced robot dog to date.  Yes, I said robot dog.  They are programmed to do things dogs do everyday, but is also a very useful tool.  It can carry up to 400 pounds of weight, and can go 20 miles without running out of fuel.  This is very interesting, because if these dogs are capable of doing these kinds of things, imaging what else they can do.  Could they possibly used in warfare?  These "dogs" may just be dogs for now, but their future we need to keep track of.  What could come of these inventions?  Something used to aid us in everyday life, or something used in the middle of the battlefield?