It would be cool if it were possible to make multicast-like transmissions using this tech.

I can imagine a rock show where the whole band goes straight into the mixer, and instead of speakers PA uses this laser tech to transmit the sound to listeners.

If you are a person who for some reason doesn't receive the transmission, it must feel very bizarre: the only acoustic sounds would be band playing the instruments silently, vocalist singing without any amplification, crowd noises.

It would be a paradise for people making / receiving orders at the bar with the live music going on.

Or imagine a night club where people on the dance floor receive music very loudly, but people outside of it receive it at a conversational level.