This lecture explores the concept of techno-scientific promises, analyzing the promise-demand cycle, credibility, and life cycle of promises. It delves into the societal impact of science and technology, the emergence of precision medicine, and the market trends incorporating nanotechnology. The presentation discusses the role of technoscientists in shaping promises, the challenges of speculative bubbles, and the importance of public participation. It also covers the ethical considerations of genetical therapy, the sociology of expectations, and the future scenarios related to technological advancements. Through various case studies and references, the lecture provides a comprehensive overview of the complexities and implications of techno-scientific promises.