Explore key insights and future directions in gesture recognition through this keynote address delivered by Joseph J. LaViola at SUI 2019. Delve into the challenges of creating accurate and robust 3D gestural interfaces, examining research projects aimed at increasing recognizable gestures and evaluating ecological validity. Learn about pen- and touch-based interactive computing, 3D spatial interfaces, and human-robot interaction from LaViola's extensive experience. Gain valuable lessons and discover potential areas for future work in this complex field. The talk covers topics such as gesture segmentation, user-dependent and independent training, context-aware recognition, and in-game experiments, providing a comprehensive overview of the current state and future possibilities of gesture recognition technology.