Thin film studies have introduced new fields of research in nanoscience and nanotechnology based on the morphology of the film. The thin film preparation from materials facilitates the various types of optoelectronic, photonic, sensing, and energy harvesting devices fabrication. However, challenges in scalability, reproducibility, and environmental stability have been concern for emerging fabrication strategies such as atomic layer deposition (ALD) and molecular beam epitaxy (MBE). The chapter discusses the current advancement in creation and improvements which impact the deposition methods of thin film on emerging trends in thin film technology. The chapter also discusses how thin film research trends in artificial intelligence integration, neuromorphic computing, flexible and wearable electronics, and quantum-optic devices. Novel material systems such as low dimensional materials, complex nanostructures, and hybrid perovskites are explained for their synergistic characteristics when integrated into heterostructures. By highlighting both research and technological gaps, this chapter aims to pave a new future innovation in thin film-based device engineering. Thin films have been utilized in wearable electronic devices, memristors, wireless communications, telecommunications, integrated circuits, optoelectronics, micro-electromechanical systems (MEMS), optical coatings, and other emerging future technologies.