Interesting. Futuristic idea: on-the-fly generate a front-end customized to the user learned preferences. Motivation: humans are poor learners, so save them the trouble to learn a new interface style. At the limit, real-time generate a whole world-in-the-world, fulfill Zuckerberg's dream -- an utterly lonely Matrix. Now that's a thinly sugar-coated version of the Hell described in e.g. Catholic doctrine. And we will chose it ourselves. Deeply sobering.
We are very good learners. That’s how we got this far. Not all new interface is good and worth learning. Sometimes it feels best to stick with what works.
It should be pretty easy (even with today’s APIs and technology) to have an LLM design a user interface for you for your current task.
Simplest way: output a JSON of simple control definitions with every answer.
Coolest way: Just have it generate a full-ass React front end or whatever on every message.