The blog post on StackBlitz titled "Flow State" discusses the launch of a new feature called Flow, designed to enhance the productivity of developers by reducing distractions and interruptions. Flow integrates directly into the StackBlitz development environment, offering tools like AI-powered autocompletions, real-time type checking, and live previews. This feature aims to streamline coding sessions, allowing developers to maintain their focus and achieve a state of deep work more efficiently.