There are knock-on / 2nd order effects in other industries, as well. E.g. if robotic trucks lower the cost of over-the-road shipping by removing a big cost component (the driver), then it might affect the breakeven point at which rail shipping becomes more desirable than OTR (currently around 500 miles for most types of freight). And if taking the human drivers out lets you run trucks nonstop for longer, overall cargo velocity could increase, which makes various types of just-in-time logistics easier. It'll be interesting to see how it all shakes out.