Comment by LiamPowell

Latex rendering, inline images, inline browser showing what it's clicking on, being able to view a spreadsheet and then select a region to reference in the conversation, clickable links when it references a specific line number with mouse-over previews, interactive inline visualisations.

There's probably more I don't remember too. In my opinion TUI apps are just silly. You don't get any of the advantages of it being just plain text because it's all wrapped in funny Unicode characters and at the same time the GUI capabilities are hamstrung by being text on a grid.