This is a beta, so no guarantee this will ever rollout in a public iOS release, take with a grain of salt.
That said, I find this fascinating, a doubling down on Apple News+. If Apple brings in actors to read stories, that’s certainly going to limit the scalability of audio (versus using Siri, or an automated text to speech process), but it will add a level of emotion and precision to the audio.
If I was a publisher, having Apple customize my content at no cost to me (assuming that’s the case) would make participating in Apple News+ more attractive.
Interesting experiment.