[dleslie]

Noise cancelling isn't enough. If I know someone is discussing topics important to my deliverables then I have to pay attention.

[thelean12]

I'm not sure how that's different than someone sending a direct message to someone in a chat. Except now you'd definitely have no idea if someone was discussing something important and you were missing it.

[dleslie]

With vocal interaction people expect an immediate response. With text interaction they are willing to tolerate a delay.