Well, this is an unexpected advance:https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.15.014053
It's basically a universal radio, picking up all frequencies at once, up through the more useful microwave bands (though this prototype doesn't quite get to the highest 5G band).
Even though it's based on quantum effects, it's likely going to be able to be miniaturized as it doesn't require extreme cold or anything exotic.
@urusan My first thought was this is great for SETI.
My second thought was: When can I listen to ALL the radio stations at once?
And my third thought was: when can I steal ALL the WIFI bands for my own usage and destroy it for my neighbors?
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