Public display layouts are great for advertising our hobby. Most public layouts I have seen, seem to be simple ovals of track with trains going in circles, so to speak. Displays at train shows are boring to watch within a short time. Granted, it takes alot of energy to set these modular layouts up, but I think the modular system has dumbed us down. Even modular layouts with scenery are still simple loops of track.
What I think is lacking are layouts with suspense. Trains disappearing then reappearing unexpectedly somewhere else on the layout. Great scenery, whether it be nature or city scares should be a part of these display layouts. The trains need a sense of actually going somewhere, doing something other than circling.
Yes, there are permanent public layouts that have the things I described. But almost every layout at a train show that I have seen is nothing more than an advertisement for the trains themselves. Potential hobbyists need a bit more. They need to see just what is possible besides ooing and aahing at the bells and whistles of today's technology.
The great Lionel showroom layouts had character. They were full of not only trains but accessories and scenery.
I know some of you may strongly disagree with my view and that's your privilege. These are just my thoughts of what I have been exposed to over the last few decades.