Audio has been around since, I suppose, the spoken language. The difference now is distribution and availability. Audiobooks, podcasts, smart phones, voice controlled home speaker systems, connected cars, and who knows what will come next.
Maybe it's a personal preference but I'm into the atmosphere. [ https://youtu.be/IInkT6n-NiM ]
Finally, we can create ads for audiobooks! Here's the news. Here's a walkthrough of how to actually create an ad in BookBub.
It's more than talking to your smartphone.