Watching those close shave inside fastballs brings back memories of Bob Gibson and Don Drysdale. Two great pitchers who would find it difficult to pitch under today's rules.
In most cases when a robot replaces a person at the work place, it's to make more profits for the company. In the case of HP umpires, a robot replaces them because the umps are terrible at their job. Btw, you know the umps are gonna hate the use of a robotic balls and strikes, but F them.