In the domain of alcohol rehabilitation, an ever-evolving landscape that continues to adapt to scientific advancements, societal changes, and the shifting dynamics of addiction, the future holds fascinating promise. As we glance ahead, we start to perceive the remarkable ways in which the industry is likely to transform, driven by technological revolutions, refined therapeutic techniques, and an enhanced understanding of the neuroscience behind addiction.

Alcoholism, defined by the American Medical Association as a primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations, extends beyond the realm of physical dependence. The intricate web of genetic predisposition, psychological factors, and social influence makes the task of effective rehabilitation a complex one. Hence, a significant part of the future of alcohol rehab lies in personalized treatment programs.

Personalized treatment programs, a novel concept in the realm of alcohol rehab, underscore the principle that there is no one-size-fits-all treatment method. These treatment programs are tailored to the individual's unique needs, personal history, and circumstances. They are expected to yield better outcomes due to their precise and targeted approach. The advent of big data and predictive analytics strengthens this approach. By processing large volumes of patient data, predictive analytics can identify patterns, risks, and outcomes, which can be utilized to customize treatment plans, thereby enhancing their effectiveness.

Another trend steadily gaining momentum is the use of Artificial Intelligence (AI) in rehab programs. AI can serve a dual role – firstly, as a diagnostic tool, using algorithms to detect patterns in behavior, and secondly, as a post-rehabilitation support system, providing ongoing assistance and monitoring. The AI chatbots, for example, can help patients maintain sobriety by offering support during cravings, tracking progress, and even alerting human counselors if the situation becomes critical.

Furthermore, the incorporation of Virtual Reality (VR) technology in treatment programs holds immense promise. VR could potentially be utilized to safely expose patients to "virtual" triggers, thereby allowing them to develop coping skills in a controlled environment. This form of 'exposure therapy' can lead to desensitization and improved resilience.

The role of medications in alcohol rehab is also under considerable scrutiny. While traditional alcohol rehab primarily revolved around detoxification and counseling, with medications playing a supportive role, the narrative is gradually shifting. Pharmacotherapy, the use of medications to treat alcohol addiction, is showing promising results. Drugs like Naltrexone, which block the euphoric effects and cravings associated with drinking, are becoming increasingly popular.

However, it's important to note that these treatments do not come without their tradeoffs. For instance, while medication can significantly reduce cravings and withdrawal symptoms, it doesn't address the psychological aspects of addiction. Similarly, while AI has the potential to provide round-the-clock support, it may lack the emotional intelligence to effectively address the emotional turmoil that addicts often face.

The evolution of the rehab industry also has economic implications. With the introduction of sophisticated technologies and personalized treatments, the cost of rehabilitation is set to increase. However, according to the economic principle of marginal utility, this could result in greater societal benefits, as more effective treatments could lead to a reduction in the societal cost of alcohol addiction.

Finally, while we speculate about these promising developments, we must also consider potential obstacles. Stigmas associated with alcohol addiction, lack of awareness, and regulatory barriers can hinder the implementation of these advances. It's critical to continue the discourse on addiction, raising awareness, and advocating for policy modifications to create an environment conducive to these innovations.

In summary, the future of alcohol rehab is set to be a fascinating interplay of science, technology, and societal factors. The emergence of personalized treatments, AI, VR, and advanced pharmacotherapy will no doubt revolutionize the way we approach alcohol addiction. Nonetheless, it is crucial to address the associated challenges, ensuring that these advancements lead to tangible improvements in the lives of those battling alcohol addiction.