Roboticists covered a sweeping range of topics at Xconomy's annual Robo Madness West conference last week, from the ethics of artificial intelligence to the powerful impact of robots that have faces. Two themes ran through all the panel discussions, whether they focused on robot design, logistics and manufacturing, drones, or artificial intelligence. Hardware--Ways to make a killing by making cheaper, better versions of certain components. People--In various roles, they make up some of the thorniest challenges to the growth of the robotics/AI sector. Let's talk about hardware first. While robot developers are benefiting from the availability of some cheap, commodity components to build their prototypes, there seems to be plenty of room for innovation, according to the Robo Madness panelists.