The document discusses the evolution of mobile tours at the San Francisco Museum of Modern Art (SFMOMA) since 2008, emphasizing the shift from leasing devices to empowering museums to create their own content and utilizing multiple platforms. It highlights the challenges in hardware distribution and the importance of content design for enhancing visitor experiences. The SFMOMA case study illustrates their collaboration with vendors to produce mobile content and the evolving visitor preferences towards using personal devices for tours.