Triggers a frequent thought that I have….. the ever-increasing size of LED screens (used mostly for advertising in shopping malls) – some are truly enormous. Easily large enough to, say, fit out a wall of my den to simulate a window looking out over a tropical beach for instance (a la SF).
But I would have expected by now that someone would have come up with an LED screen on a large sphere. Lot's of things you could do there I think including the subject of this thread and it could be time-variable. So history through the ages etc.