The adventure of Human Computer Interaction (HCI) or Man-Machine Interaction or Interfacing (MMI), has ushered in a lot of innovations, bringing about greater development in relation to smart homes. The rise of pervasive computing has significantly influenced modern technological advancements. Human-Computer Interaction (HCI) is an interactive process that encompasses both users and technological systems, ensuring that both usability and functional goals are met. Smart home technologies empower users to manage their living environments through the automation of various systems, such as lighting, security, and household electronics. Many of the tools commonly employed in computing systems can also be adapted for use in smart home environments. The advent of ubiquitous computing has reshaped our lifestyle and social interactions within a wireless communication framework. This paper explores the practical applications of smart homes and HCI. Additionally, it discusses the necessary requirements for implementing smart home technologies and HCI systems. The study also delves into challenges in HCI and envisions the future of the field with a focus on multimodal interaction, intelligent systems, adaptive user interfaces, and proactive technologies.