Europe 2026
Beyond Components: Designing Generative UI for MCP Apps — Ruben Casas, Postman
Overview
This talk explores the evolution of generative UI for Multi-Component Platform (MCP) applications, moving beyond static components to more dynamic and collaborative interfaces. It posits that current AI models are capable of generating sophisticated UI code, prompting a re-evaluation of how users interact with AI-powered applications. The core thesis is that the future of generative UI lies in collaborative experiences rather than just component-based outputs.
Who should watch
- AI Engineers
- Product Managers
- Builders working with AI agents and MCP applications
- Those interested in the future of user interface design for AI
Key takeaways
- Early AI UI generation involved copy-pasting code snippets from models, a process described as the "poor man's" approach.
- Recent advancements in models like GPT-4.5 and Opus 4.5 have led to high-fidelity UI generation, capable of producing functional and thoughtful interfaces.
- The current paradigm of static UI components, where agents orchestrate tool calls to predefined elements, is being challenged by more dynamic approaches.
- Declarative UI represents an evolution, using descriptors (like JSON or YAML) to map agent instructions to static components, allowing for more personalized interfaces, similar to Netflix's personalized homepages.
- Generative components, where AI models directly create HTML, CSS, and JavaScript on demand, represent the next frontier, though they introduce security concerns requiring sandboxing.
- MCP applications are highlighted as a crucial delivery mechanism for generative UI due to their built-in features like sandboxing, authentication, and tool calling.
- The future of generative UI is envisioned as a collaborative experience between humans and agents, moving beyond simple component rendering to shared interactive artifacts, exemplified by tools like the Excalidraw MCP app.
Notable quotes
*We went from few lines of code is great. It can it runs. Oh. And now it can write better front-end code than me.*
*The GUI has not been invented yet. It's like we are in the '70s, where everything was just text.*
*MCP apps are the best uh, delivery mechanism uh, for generative UI.*
Unofficial community note. Prefer the recording for nuance.