to be more precise, we're heading into a world where the radio signals blanketing our planet will be leveraged as a realtime omniscient surveillance field. [1][2]
i sound like a conspiracy nut every time i bring this up, but wireless-networks-as-a-sensor seems unavoidable. there simply is no way to keep improving wireless transmitters without also increasing their environmental awareness and therefore leaking data about physical spaces. even simpler networks like wifi will dynamically adapt channels, frequencies to optimize speeds and it turns out you can extrapolate a lot from that [3]. advanced networks with features like beamforming are even more responsive to their environment and therefore more leaky. we're making accidental cameras, and they can see through walls.
it seems like this is going to be a "feature" of 6G mobile networks. read up on "joint communications and sensing" to find research in this area. (it's not just nokia.)
