Hardly. Imagine licensing your voice to Amazon so that any customer could stream any book narrated in your likeness without you having to commit the time to record. You could still work as a custom voice artist, all with a "no clone" clause if you chose. You could profit from your performance and craft in a fraction of the time, focusing as your own agent on the management of your assets. Or, you could just keep and commit to your day job.

Just imagine hearing the final novel of ASoIaF narrated by Roy Dotrice and knowing that a royalty went to his family and estate, or if David Attenborough willed the digital likeness of his voice and its performance to the BBC for use in nature documentaries after his death.

The advent of recorded audio didn't put artists out of business, it expanded the industries that relied on them by allowing more of them to work. Film and tape didn't put artists out of business, it expanded the industries that relied on them by allowing more of them to work. Audio digitization and the internet didn't put artists out of business; it expanded the industries that relied on them by allowing more of them to work.

And TTS won't put artists out of business, but it will create yet another new market with another niche that people will have to figure out how to monetize, even though 98% of the revenues will still somehow end up with the distributors.