Aside from entertainment/marketing purposes, I think UI will become useless. Why should I interact with UI when an agent can (and will) interact with it?
Because you do not know everything and information (possible inputs, actual outputs) still needs to be presented to you. Because text is not the best way to present everything. Because consistency of presentation makes it easier to absorb. Because everything is social and standardization is useful.
I hooked up our Hubspot to Claude and also found it very valuable, but I actually found the most value there in entity linking, data cleanup and general data processing more than the UI changes.
I still had Claude make me charts because I wanted to understand what was going on though.
I'm not routinely involved in sales, but if I was I feel like there are some breakdowns I would want to see regularly.
I also want to note that my startup sells an infra product. It doesn't need a UI, but people fucking love charts, so we built them the charts and they are happier.