In 2021, the landscape of frontend development is expected to be shaped by several key trends, according to Piero Borrelli. React continues to dominate the frontend framework market, although new frameworks like Svelte and Stencil are gaining traction. TypeScript is becoming a standard for developing complex web applications due to its ability to enhance code readability and maintainability. Jamstack architecture is gaining popularity for its performance and cost benefits, with Gatsby and Next.js leading the way in static site generation. Testing remains a critical component of development, with Jest as a popular tool thanks to its integration with React. Headless CMS solutions are seeing increased adoption for their flexibility in delivering content across multiple platforms. As the frontend world rapidly evolves, developers must stay informed and adapt to these emerging technologies to advance their careers.