The document discusses how emerging "smart city" technologies and changing consumer behaviors are prompting changes in point-of-sale technologies used by retailers. Specifically, it discusses how new mobile point-of-sale systems allow retailers to take advantage of pop-up stores and temporary locations in smart cities to better engage customers. The systems integrate payment processing, inventory management, and marketing tools to provide flexibility to retailers. They also have features tailored for temporary retailers like customizable inventory categories and alerts as well as reporting on sales trends. This allows retailers to make quick decisions on product mix for pop-up stores and target consumers more effectively.