This paper explores the transformative potential of haptic design and human augmentation, inspired by Dr. Minamizawa's keynote address at the 2024 Emerging Media for Communicating Sustainable Development Goals conference (held in Yang Ming Chiao Tung University, 30 March, 2024). By integrating tactile feedback into prosthetics and wearable devices, and employing robotic avatars and virtual interfaces, these technologies bridge the physical and virtual realms, redefining presence and interaction. The convergence of haptic design with telexistence and human augmentation enhances sensory engagement and bodily awareness, challenging traditional boundaries between biology and technology. However, these advancements might also raise ethical considerations and societal concerns about privacy, accessibility, autonomy, and safety. The future of human augmentation demands responsible development and inclusive dialogue to ensure empowerment, equity, and collective progress. This paper highlights the need for a human-integration approach to navigate the opportunities and challenges presented by these emerging technologies.