In examining the trajectory of the alcohol rehabilitation industry, it becomes apparent that it is not impervious to the tides of technological advancement, societal change, and novel research findings permeating the rest of the healthcare sector. The future of alcohol rehab is set to be defined by a confluence of innovative trends and predictions, encompassing a wide array of dimensions from personalized treatment to integration of technology, and from increased accessibility to destigmatization of the recovery process.

A key element of the alcohol rehab landscape of the future is the shift towards personalized care. Drawing parallels from the advent of personalized medicine in the broader healthcare sector, this approach in alcohol rehabilitation takes into account the genetic, environmental, and lifestyle factors influencing an individual's alcohol addiction. One size simply does not fit all anymore, and the future dictates the need for a tailored treatment strategy that caters to the unique needs and predispositions of each patient.

Next on the horizon is the integration of technology. The ubiquity of smartphones and the rise of telemedicine provide a practical platform for delivering alcohol rehab services to individuals who may not have access to traditional treatment centers. Applications that offer cognitive behavioral therapy, for instance, are predicted to become more commonplace in the future. This caters not just to a convenience aspect, but also addresses the issue of stigma and confidentiality, often associated with seeking help for alcohol addiction.

The democratization of access to alcohol rehab services is a seminal trend shaping the future of the industry. Historically, the prohibitive costs and geographical constraints of traditional rehab facilities have acted as barriers to treatment. However, future predictions indicate a shift towards a more equitable distribution of access. This is facilitated by the interplay of several factors including policy changes favoring mental health parity, innovations in telehealth, and the advent of community-based recovery support systems.

The role of legislation cannot be undermined in sculpting the future of alcohol rehab. An example is the Mental Health Parity and Addiction Equity Act in the U.S, which mandates insurance providers to cover treatment for mental health issues, including alcohol addiction, on par with physical health ailments. Legislation such as this not only paves the way for increased accessibility but also contributes to destigmatizing alcohol addiction by recognizing it as a legitimate health issue.

Furthermore, the growing recognition of the biopsychosocial model of addiction is poised to reshape the future of alcohol rehab. With roots in Engel's biopsychosocial theory, this model posits that biological, psychological, and social factors contribute to the disease of addiction. This holistic perspective necessitates a multidisciplinary approach to treatment, integrating medical, psychological, and social support services.

However, it is worth noting that this future vision of alcohol rehab is fraught with challenges. Personalized treatment implies a deep understanding of individual genetic profiles and their interactions with environmental and lifestyle factors. This requires significant investment in research and data analytics. The rise of telehealth brings with it concerns about the quality and effectiveness of care, and patient adherence to treatment. The democratization of access must also deal with issues of disparities in broadband access and digital literacy.

The future of alcohol rehab is not a foregone conclusion, but a fluid construct shaped by the interplay of numerous factors. By understanding these trends and their implications, stakeholders in the alcohol rehab industry can proactively build a future where treatment is personal, accessible, and devoid of stigma, integrating the best of technology and medical innovation. The journey towards this future may be fraught with challenges, but the reward - a world where recovery from alcohol addiction is a reality for all who seek it - is certainly worth the effort.