Have heard that magnetic shrimp boats, on a vertical screen, were once used in Oz.
Not magnetic, shrimp boats were held to the screen by the surface tension of the water. Used in Oz til about 1996 when eventually the old "bright" displays were replaced. Did my first enroute and arrivals ratings using shrimp boats. Glad they're gone.
Shrimp Boats had a habit of falling off the screen, knocking several others off, at the worst possible time. Required all aircraft to be re-identified. Then try using shrimp boats while holding ....aaarrgh! Give me a labelled display anyday.
Oz has a approach sequencing tool called Maestro. Works fairly well, but still requires a controller to oversee. Of course, completely useless with any sort of significant weather diversions.