Explore the world of multi-touch user interfaces in this 41-minute conference talk from GOTO Aarhus 2012. Delve into emerging trends, interaction models, and key factors for designing gesture and touch interfaces across personal, mobile, and large format devices. Gain insights into the multi-touch landscape, including alternative technologies, industries, and operating systems. Learn about user experience examples and techniques, the challenges of multiple users, and the importance of gesture learning. Examine the concept of natural user interfaces and the role of the research community. Discover the significance of global and local considerations, ergonomics, cost factors, and the potential of machine learning in touch interfaces. Consider the implications for accessibility and the development of gesture standards. Presented by Alan Boykiw, User Experience Evangelist at SMART Technologies, this talk offers a comprehensive overview of multi-touch UI design and implementation.