[Analemma_]

Gary Bernhardt's "A Whole New World" had a cool vision for what the future of editors might look like: https://www.destroyallsoftware.com/talks/a-whole-new-world

[nathcd]

And here's[1] a project inspired by Gary's talk to design and implement a new escape protocol and a new virtual terminal to support these sorts of use-cases. (I'm not involved with the project.)

[1] https://github.com/withoutboats/notty