Researchers have made advancements in growing vertical heterostructures, including rhombohedral-stacked single-crystal WS2/MoS2. The growth of these structures has been achieved on a centimeter scale, although technological limitations of certain deposition methods have been noted. The field of two-dimensional materials is continuing to evolve, with new frontiers emerging in areas such as van der Waals heterostructures and sliding ferroelectrics.