To take one example of where this is valuable:

- Take some dense research paper or other material that is unsuitable for listening to aloud

- Listen to it (via NotebookLLM) whilst commuting/washing up or whatever

This way you'll have a big headstart on what it's all about when you come to read the details.

I imagine in future we'll see a version of this where the listener can interject and ask questions too, that feels like a potentially very powerful way to learn.