  In the last years, we have experienced the evolution of wireless localization
from being a simple add-on feature for enabling specific applications, to
becoming an essential characteristic of wireless cellular networks, as for
sixth generation cellular networks. This perspective paper will revolve around
the role of radio localization in all the cellular generations, from first
generation to 6G, and it speculates about the idea of holographic localization
enabled by the advent of large intelligent surfaces, made of metamaterials.
Along this line, we briefly introduce the current state-of-the-art of the
available technologies, and we illustrate the road ahead with the inherent
challenges brought by this new technology.
