Using neural networks to solve inverse-scattering problems (like wifi scattering off a human body, for example) seems to have a lot of potential. The lack of phase-information (i.e. not just signal intensity but instantaneous phase of the EM wave) captured by traditional receivers makes this class of problems so difficult to approach since you are blind to a significant portion of the available EM information. Mitigating this by constraining your solution-space to 'reasonable' outcomes is practically very difficult... for a human. Very cool to see such a practical demonstration of a neural network seeming to accomplish exactly this.