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This is cool and all that, but I want to know if they got the invisibility cloak to work?

(Kind of hard to get good pics of an invisibility cloak, unless you can see Potter's hand sticking out.)

Also, could this tech (conceivably) make a better smart mirror - aside from a tinier more ingrained display for the electronics, could it modify the light before reflecting it back?

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Even if it just switched the mirror between reflecting and not, I think it would be cool.

The real game-changer with visible light metamaterials is negative index of refaction, which will allow for completely flat optical lenses. Light-weight and low distortion. Hopefully coming to VR headsets in my lifetime.

>Even if it just switched the mirror between reflecting and not, I think it would be cool.

This is basically how DLP projectors work

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

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