The document discusses how the software-as-a-service (SaaS) model is disruptive and changes the game for customers, investors, and vendors. It provides examples of how the SaaS model improves economics for each group by offering recurring revenue, increased visibility, and lower costs. The SaaS model requires significant capital to fund high growth, and companies must focus on retaining customers and cross-selling to fully capture lifetime customer value in order to attract investors. Emerging trends like merging with social media and leveraging cloud platforms provide new opportunities for SaaS companies.