Reconfigurable Intelligent Surface (RIS) technology has been attracting rising interest for various advanced wireless applications, including effective non line of sight (NLOS) transmission at high frequencies designated as mmWave. This is despite RIS being some years away from full commercialization to the extent that it is sometimes designated a 6G technology. The momentum reflects rising conviction that it really will bring about a fundamental boost in mobile capacity and performance worthy of being called a new generation. There are three primary use cases for mmWave, and therefore where RIS-based improvements to both macro and micro RAN infrastructure could be put to use. The first is addressing zones of temporary density and congestion, such as venues and stadia, either indoor or…