I would love if advances in material technologies would allow to design a window glass-like material that would let outside air in, but would cancel exterior sounds.
I have seen such a thing in an article, though I don't know how to find it. It was a window with a square grid of circular holes in it - air could flow through, but sound waves were dissipated.
That's active electronic noise cancellation - there have been many of those described and very few delivered over the past thirty years. Presumably because it's the sort of thing that is angle-sensitive and hard to set up and maintain.
The thing I saw was just a pane of glass or plastic with large round holes in it to attenuate/dissipate sound waves while allowing significant airflow.
