A 2000 sq meter duplex living room for the most expensive house in the world, featuring intricate space circulation. Utilize parametric design, organic shapes, and fluid geometry across both levels. Incorporate luxurious materials, curvilinear forms, dynamic facades, and responsive skins. Integrate cybernetic interfaces, biomimicry, and generative design to create opulent, multi-layered structures and complex, non-Euclidean forms, ensuring unparalleled elegance and innovation throughout the duplex.