The document outlines Aaron Parecki's presentation on ambient discovery at an augmented reality event in May 2011. It discusses the increasing availability of location data due to GPS hardware in phones and affordable services. It proposes using real-time location data and location-based triggers to provide information to users, automate tasks like home lighting, and enable new types of mobile games and applications. The presentation argues that ambient discovery requires intelligent systems that use location to automatically act on a user's behalf.