The document discusses themes and observations from the ESE 2015 conference. It summarizes some key themes discussed at the conference: - The promise of enterprise search to search across both structured and unstructured data sources within an organization. - A "search immaturity model" was presented which considers the many contextual factors that impact a user's search experience, such as their task, environment, abilities and more. - There was discussion of how end user expectations are changing due to consumer technologies, and users now expect intuitive, personalized search experiences similar to consumer search engines.