Many rapidly evolving technologies are being incorporated into Robots as quickly as they become available.
Power is The Big One. Improvements in Batteries and Solar will greatly influence adoption. Drones and Robots are currently held back by power issues. Many of the demonstration videos show power cables or on board gas generators being used, for now.
Neural Network Learning promises to free users from needing to teach Robots in detail how to do every simple task. Robots will learn from us, and from other robots.
Nano Technology will allow for smaller and smaller machines, some at the scale of blood cells.
3D Printing will allow Robots to build other Robots.
Shape Shifting Robot technology will allow robots to go nearly anywhere.