[frazar0]

Don't know much about the invisibility cloak. But in wireless communications the "better smart mirror" idea is being investigated to achieve arbitrary reflection directions that defy Snell's law [1][2]. The objective is to hang these "mirrors" on walls/buildings and reflect the incident power towards areas where the reception is poor.

[1] https://arxiv.org/abs/2110.09183

[2] https://ieeexplore.ieee.org/document/9718037