I'm amazed that everything is being digitized now. There are fewer and fewer brochures and more and more voiceovers explaining everything under the sun. Remember that HR departments are creating and endless stream of audio and narrated power point presentations to train employees.
Gone are the days when companies would pay huge sums of money to bring in experts to train people on every subject from process to presentations, (I was one of them for the state of California).
Now everything is done as a recording and then kept and updated in their training libraries.
New authors are also looking to create audio books of their new works to broaden their income potential.
Go get them!