I think AI Generative Fill is a good example of the sort of feature that has practical value for end users:
There are lots of AI-powered audio filters, from restoration to instrument extraction or suppression, etc.
I might be willing to use a code editor that can point out errors or generate simple blocks of code, if it works well enough and is sufficiently unobtrusive.
I'm also looking forward to DLSS-like scaling and framerate enhancement, but for regular video files & streams.
I think there are plenty of examples, but it's a little hard to predict what sorts of ideas people will come up with. I think it would be a mistake to limit your thinking just to LLM-powered chatbots.