Fuchsias underlying goals are to be a great platform for computing. This is distilled in its current incantation into a short tagline on fuchsia.dev: simple, secure, updatable, performant.
The details of how when and where Fuchsia might fit / gets exercised are nuanced and far more often about other factors than those which make great stories. Maybe there will be some of the good stories told one day, but that'll need someone from the team to finish a book and take it through the Google process to publish :D
In the meantime, here's Chris interview: https://9to5google.com/2022/08/30/fuchsia-director-interview...