Folks have used Roll-able tables to make custom dice(Like Edge of the Empire), randomize a list of results(Like random effects or crit decks), as tokens with varying images(like a Summon Monster token with different kinds of creatures), etc. Any text or image you would want to put in a table and be able to select manually or roll randomly that you can think of, really. The one thing it DOESN'T do well is holding dice roll placeholders (you couldn't have a table of d4+1, d6+2, etc and have it actually roll)