AWS Amplify introduces a next-generation application-building experience that empowers frontend developers to focus on writing differentiating code. The new code-first developer experience uses TypeScript for both frontend and backend, automatically inferring and provisioning backend resources. It offers per-developer sandboxes for rapid iteration and is built on CDK constructs for full access to AWS services. The presenters demonstrate how to quickly set up a full-stack application, including authentication, database, and real-time updates, using this new approach. They showcase the simplified workflow for deploying to production environments and managing multiple branches.