The pursuit of innovation shouldn't stop after you make and deliver your products. Indeed, forward-thinking companies continue to serve their customers – and keep innovating – long after their products arrive at their customer's door or loading dock. Services are becoming a main part of the business and a significant revenue stream, and new business models are shaping the way these services are provided. More companies are selling "products as a service" and fundamentally changing the nature of their customer relationships. And they are fueling growth and market dominance in the process.