PCF (PowerApps Component Framework) allows developers to build reusable UI components that can be deployed across PowerApps models and canvas apps. It uses modern web technologies like HTML, CSS, and JavaScript/TypeScript. PCF provides a CLI and test harness for component development. Speakers demonstrated how to build a sample pulsing notification component using PCF and discussed advanced topics like using React with PCF. The roadmap includes enhanced React support and a Visual Studio code extension. PCF provides opportunities to build higher quality, reusable and cross-device compatible controls compared to traditional web resources.