Earth Mountain almost there, page-288

It would be almost like magic if

1. A person only hears the content of their personal sound beam

2. That person cannot hear the content of any other person's sound beam, and

3. A personal sound beam is able to provide noise cancelling to hush extraneous noise, including for example another person's phone call or cheers to the football or singing along to their personal sound beam's tune.

It might be quite a while before we have number 3. It may never be possible except by using wearables, which we have now.

Somebody will say "Tell him he's dreaming."