I look forward to a day I can click a button to watch videos online without any unnecessary and distracting background music (though it would be better if there were an option and precedent to offer unornamented narrative in video players). The next step after this would be to have live 'music cancelling' headphones for the grocery store (if such a thing still exists).
Wow. Office background noise mute.
The headphones can filter out speech that isn't above a certain threshold. Coworkers nearby can be heard loud and clearly.
Music can play at volume then quiet itself when it detects a person speaking directly to you.
Maybe even a training button to inform it that it is false-positive-ing background noise, or true negative and silencing a co worker you would like to hear.