I agree Stu. We now have the screens in the flight deck but hooking up cameras appears to be a huge problem. Greedy, racpacious manufacturers and Euro-muppets in EASA (& their kind worldwide) mean that installing such useful things is prohibitively expensive. Other aids to safety would be simple mirrors on terminal buildings so we could monitor what is happening around us, but again these things are considered to be impossible. Maybe because these things might give us the information to make sensible descisions by ourselves without having to resort to others. After all, you can't give power away.
PM