The advances in the multiscale multi-component organization of ensembles of monodisperse colloidal nanocrystals (NCs) with controlled composition, size, and shape now represent a new strategy for soft optical metamaterial fabrication. These NCs, acting as 'artificial atoms' with tunable electronic, optical, and magnetic properties, pave the way for the development of a new periodic assembly. They are ideal building blocks for incorporation into new thin films, micro-resonators, and integrated devices. In this brief talk, I will briefly outline how these tailored NCs can be assembled into single-component, binary, and ternary NC superlattices, providing a scalable route to the production of soft metamaterials. The scalability of this process ensures its feasibility for large-scale applications. The modular assembly of these NCs enables the enhancement of desirable features of the underlying quantum phenomena through photonic feedback. Strategies for emulsion-based assembly that enable continuous production and tuning of stimuli-responsive, tunable photonic resonators from dense NC 'supraparticles' will be highlighted. Progress in the optical characterization of supraparticles and their potential as whispering-gallery-mode resonators, with a low lasing threshold, will be shared.