Talking of Northern General Hospital and "real time" displays; try finding any on-screen departure times for buses to get you there direct. Frequent services 47 and 48 do not leave from an "interchange" - mini or maxi - so NGH, despite being a major traffic objective, doesn't appear. You can go to "ACIS live", if you can find it, but that only gives rudimentary destination information, not intermediate points.
So much for the benefits of the latest technology. Give us a "timetable book" any day!