This is part of the general trend in robots summed up roughly like: 1. Corporations want to save money and are willing to spend up front for it. People will rep

This is part of the general trend in robots summed up roughly like: 1. Corporations want to save money and are willing to spend up front for it. People will replace personal vehicles far more slowly. 2. A restricted environment is way easier to engineer a robot for vs. arbitrary environments. 3. It is easier to train workers about working around heavy machinery than to teach arbitrary humans to look both ways before crossing the street. 4. It is way easier to get permission on privately owned land than to convince the government for a state or nation wide laws. I work in autonomous drones and see similar trends in that space too.