This study investigated the potential of large interactive displays to enhance patient-clinician communication and engagement during clinical consultations. Despite the increasing use of technology in healthcare, traditional desktop computer screens often hinder interaction and shared decision-making. We conducted a mixed-methods study involving 18 participants to compare a large interactive display to a PC display and printouts in simulated consultations. Participants engaged in tasks involving fictional health data visualizations related to sleep, physical activity, and sedentary behaviour. Quantitative data gathered through post-interaction questionnaires using validated scales revealed no statistically significant differences between the mediums in terms of patient understanding, activation, decision-making, or satisfaction. However, qualitative data, collected through semi-structured exit interviews and analyzed using a grounded theory approach, indicated a preference for the large interactive display. Participants found the large display to enhance visibility, promote a face-to-face layout that facilitated communication, and offered greater control over their health information, fostering engagement and a sense of empowerment. While the study’s small sample size and simulated setting limit generalizability, the findings suggest that large interactive displays, when designed with a focus on usability and user preferences, hold promise for improving patient-clinician communication and supporting shared decision-making in clinical settings. Feedback from clinicians emphasized tailoring role-specific functionalities, improving time progression representation, and enhancing usability through personalized assistance, visual clarity, and accessible help resources. Future research should explore optimal interface designs, EHR integration, and the use of voice commands to further enhance the effectiveness of this technology.