Experts' views on the use of mostly digital technologies for dementia prevention are characterized by a simultaneity of "gerontechnological optimism" and skeptical hesitancy. Despite the hope for progress in dementia prevention through preventive technologies, experts also point to the complexity of prevention, the importance of environmental factors and public health policies, and the danger of an excessive focus on individual interventions. Without questioning the positive impact such technologies can have on many people, we claim that the experts' ambiguity reveals a deeper concern, a kind of "cruel optimism" that is based on a fantasy of "supported autonomy".
Keywords: Ambiguity; Canada; dementia; gerontechnologies; optimism; prevention.