Many say they would be useful for RPGs, but how? I know those that play with a large screen (i.e. old tv) on the table to display maps while playing. You do not need to track the pieces for that though? Typically the GM has a phone or laptop with a UI to control what is displayed when, to reveal new areas etc. I can't imagine a game or time when it would make sense that a player moves a miniature/token on a digital board and triggers something that happens automatically? Maybe if you were playing more like a solo or coop CRPG without a GM, but that is a completely different kind of game and everyone here is specifically mentioning using it to support TTRPGs.