The pitch for generative UI is simple: stop making users navigate menus and let them say what they want. Every AI product demo shows the same thing: type a prompt, get a result, skip the 47-click workflow. It looks like progress.

Jakob Nielsen names what gets lost in the trade:

However, eliminating the Navigation Tax imposes a new Articulation Tax. In a menu-driven GUI, features are visible and therefore discoverable; a user can find a tool they didn’t know existed simply by browsing. In an intent-based AI interface, the user can only access what they can clearly describe.

“Articulation Tax” is the right frame. Menus are clunky, but they show you what’s possible. A blank prompt field assumes you already know what to ask for. That’s fine for power users. It’s a problem for everyone else. Nielsen:

The shift from WIMP to World Models represents a transition from Deterministic to Probabilistic interaction. In a WIMP interface, clicking an icon is deterministic: it produces the exact same result 100% of the time. In a generative world model, the system is probabilistic: the same prompt may yield different results on different attempts.

Deterministic to probabilistic is a trust problem. Users learned to trust GUIs because the same action always produced the same result. That contract is gone. Users will adjust eventually, but most aren’t there yet.