I would assume something like Fortnite, PUBG and Call of Duty games as an example. I'm curious to use cases outside of (obvious) games. Is there any situation that is not possible to do on a Linux desktop, that requires to use Android or iOS app? Like banking, is there any bank that only offers a mobile app and nothing else? That's the issue I have right now, finding a real use case where I have to use it (obviously there is none for me personally, so finding it wouldn't make it a requirement for me).