Various other developments of the optics research relying on -plates can be foreseen for the next few years. In the classical optics domain, the possibility of writing more complex patterns in the liquid crystal structure could give rise to new optical functionalities, enabling, e.g., the generation of more complex structured light beams, possibly useful for particle manipulation, or for optimized applications in optical coronagraphy. Other possibilities are the simultaneous generation of arrays of optical vortices or the creation of new optical device concepts based on suitable sequences of -plates. As few-mode optical fibers become more attractive for large-bandwidth optical communication, by exploiting the emerging technologies of space-division multiplexing, the -plates devices could become important photonic elements to address different spatial modes in a direct way, couple them together during propagation, or to couple them to free-space external modes. In the quantum optics domain, the possibility of encoding an increasing number of qubits per photon may allow significant progress in quantum communication and, possibly, even in small-scale quantum computation. Quantum walks in the space of OAM could supplement other methods for performing the quantum simulations that are mimicking other more complex quantum systems in a perfectly controlled setting. Finally, new possibilities for quantum information storage or quantum processing may arise from exploiting the interaction of light carrying OAM with trapped cold atoms or with hybrid light-matter systems, such as Bose–Einstein condensates of exciton polaritons in semiconductor microcavities.