I'll just quickly say that the categories of the robots are basically all established. You're going to see incremental changes like the iPhone 4 to the iPhone 5. The cameras will get better, and the batteries will get better. There's no huge jump that way.
The huge jump that's coming is that these robots are going to all start cooperating. It's called swarm robotics. It's been worked on for a long time and it's starting to become very useful, the way that these things start to understand the situation of the other unmanned systems around them, so that if one of them falls down, the others converge and cover off the area.
I think you're going to see less and less human involvement in robotics, and that on a very steep curve, until—and I'm not talking more than five years from now—you will not need a human to even look at these things. They'll be doing their job 24 hours a day.