''5G of wireless networks is at an early deployment stage, providing a single platform for a variety of services and vertical applications. However, novel concepts as well as new services and related use cases, incorporating new enabling technologies to satisfy future needs, are already being identified for addressing the current predictions for the performance requirements of the next 6G of connect-and-compute networks around 2030. Among those predictions belong the up-to-10 Gbps/m3 capacity, 100 µs latency, 1 Tb/J energy efficiency, and 1 cm localization accuracy in 3D, which will need to be offered individually or in various combinations. As a common view, wireless networks are designed considering the signal propagation environment as a black box that cannot be artificially controlled. This would exacerbate the simultaneous fulfilment of fundamentally conflicting targets.''