I like HUDs as an analogy for other forms of content/experience enrichment too e.g. what's a HUD for other forms of interaction than just looking at screens (like audio, or multimodal).

Can we embed useful data behind the content we produce/consume or derive personalised versions for the user?

-> Text/audio/video tailored for me and my interests? (ie. not just content recommended for me, but the content itself is tailored for me in terms of the insights and practical applications) -> Podcasts I can interact with? -> Audiobooks I can ask questions about?

Richer interaction that allows for more back&forth and key insights for the user and use case.