Where I used to live, the digital signage only showed the schedule, not the actual train ETA. The schedule was almost completely useless, however, the online website (at the time) didn't show the schedule for every station (edit: they still don't). So there was some use, at least. Not that it mattered, since the train never met that schedule, outside of the first run of the day.
Then covid hit, the city paused train service, I moved out, and I really don't care to commute to work (or school, at the time) again.
Amtrak had added the signage when I was using it in Southern California, and it could be fun to watch it continually update the "expected arrival time" which seemed to only jump by five minutes even when the train was physically thirty minutes away. The website was much more accurate about where the train was and when it would arrive.
Then covid hit, the city paused train service, I moved out, and I really don't care to commute to work (or school, at the time) again.