This podcast episode explores the upcoming addition of mixins, functions, and style queries to CSS. These features will enhance the capabilities of CSS, allowing developers to write more modular, maintainable, and dynamic code. Custom functions and mixins will enable developers to create bespoke code tailored to specific project needs, while style queries and CSS objects will make CSS more expressive and powerful. The speakers encourage developers to participate in the standards process and provide feedback to ensure that these new features meet the needs of the web development community.