The document discusses how the publishing industry is shifting from a product-centric model to a community-centric model as the market and ways to reach audiences change over the next 20 years. It argues that publishers should move towards vertical specialization within communities to stay relevant. The future of publishing is predicted to involve more user-generated content, subscription models, and ownership of audiences and attention rather than content alone. Publishers are advised to understand their vertical markets, engage communities online, and experiment with new business models and strategies to transition successfully.