Agents are building their own UIs now. Here's when that's worth doing.

This is a submission for the Google Cloud NEXT Writing Challenge During the developer keynote at Google Cloud NEXT '26, a GDE demoed FinnishIt: an AI-powered Finnish language tutor built on the GenUI SDK for Flutter. You give it a topic, it asks refining questions, then generates a custom deck of interactive flashcards specific to that context. Role-play scenarios shift from text to tap-and-drag word puzzles to fill-in-the-blank modules depending on what the AI determines you need right now. Eve