Based on the rest I think they don't mean actual natural language interface, but having enough personalisation options to setup the UI in a way that's natural for your workflow. They are just speaking 2026-corporatise instead of English.

The full sentence is:

“Definitely, the idea of extensions and just customizations in general is: can you create more of like a natural language interface that lets people do everything they want?” Varma added. “For example, we announced an update that we’re doing to our design, which is called Project Nova. And a lot of people didn’t like the rounded corners modernization. Now, we can let people pick how round they want their corners. People care, so we put it in the settings.”

They also mention some misguided "AI" features, but not in this part.