**Background:** The paper addresses the convergence of two major societal trends: population ageing and the digital revolution. By 2050, one in five people globally will be over 60 (2.1 billion), and 70% of the world's population will live in cities. The EU4Health Programme projects that by 2070, one in three Europeans will be over 65, with an active-to-inactive population ratio of 1:4 (currently 1:2). The authors argue that while technology (IoT, ambient intelligence, smart homes) has advanced rapidly, the architectural and spatial dimensions of assisted living have been neglected. The concept of Active Assisted Living (AAL) originated from an EU programme launched in 2008 (initially called Ambient Assisted Living, renamed in 2014), but the authors contend it lacks a theoretical framework for architectural design.
**Methods:** This is a critical narrative review using a search, appraisal, analysis, and synthesis framework. Databases searched include Web of Science, Scopus, PubMed, Science Direct, Avery (Columbia University), and RIBA (Royal Institute of British Architects). Keywords included 'Active Assisted Living', 'Ambient Assisted Living', and combinations with 'Ageing Population', 'Cognitive Disabilities', and 'Smart Cities'. Publications were filtered by date (focusing on the last 15 years, with special attention to 2006–2008 for the concept's origins and 2014 for the reterming). The analysis revealed that approximately 40% of publications came from medical disciplines and over 45% from technical fields, with very few from architecture.
**Key Results:** The review identifies several key findings: (1) Of 155 projects financed by the AAL-1 Programme (2008–2013), only 19 introduced market solutions—a market maturation rate of approximately 1 in 10. (2) The PERSONA Project classified four types of services needed by older adults: services for Instrumental Activities of Daily Living (IADL), injury prevention, social integration, and mobility. It defined four spatial levels for service distribution: the person, the home, the neighbourhood, and the city. (3) The AALIANCE Project proposed three spheres: domestic ('ageing at home'), work ('active ageing at work'), and social ('ageing in the community'). (4) The AAL-2 programme (2014–2020) had a budget of approximately 600 million Euros under Horizon 2020. (5) Most implemented services focus on home environments (telemonitoring, fall prevention, vital sign monitoring), with very few in professional or social environments. (6) Major barriers include: limited technology adoption by current older adults, privacy and ethical concerns regarding data handling, reliability and maintenance issues, lack of interoperability between proprietary systems, and—critically—the absence of an articulated theory connecting AAL to architecture and urban planning.
**Clinical Implications:** The paper highlights that current AAL implementations do not adequately segment the older adult population, particularly neglecting people with cognitive disabilities such as Alzheimer's disease. The authors argue that meaningful AAL requires architectural design that integrates ambient intelligence with cultural and symbolic dimensions of space, creating environments that serve as an 'exo-brain'—adapting to gradually changing needs while preserving a sense of belonging, identity, and autonomy. The paper calls for legal frameworks to regulate data privacy, population-specific AAL development for cognitive disabilities, and a paradigm shift from technology-centric services to holistic, architecturally integrated solutions. The authors conclude that future smart cities must add dedicated 'layers' or 'grids' to support healthy ageing and cognitive disability, with adapted housing and services designed for a constantly evolving ageing population.