Watcher is actually a title you can seize in the Conclave (everyone gets a title!), and it allows you to exert some control over the spawning of steam columns. This is especially important since columns are heavily related to geothermal resources (aka GEOs), which are your victory points, if you will. The clans have organized around a neutral Conclave, which distributes positions. Every clan gets a position, like Watcher.