Book excerpt: What sort of health system do we want to implement in the face of the imminent arrival of artificial intelligence and robotics in medical practices? The Covid-19 health crisis has demonstrated the importance of digital technologies in the care of patients and their families, as imperative attention was called to ethics and relational practice. This book analyzes numerous sources of feedback to reveal the multiple facets of this so-called Medicine 4.0. It reveals the extent to which digital medicine requires new forms of organization and new approaches to co-conception, in a logic that is resolutely collaborative with patients. The book concludes with legal and ethical points of view in order to challenge the reader on their duty to truly be an "actor" of their health care.