I think it will probably kill the current Business Model of the VA Industry. Having the ability to generate as much audio content as you like without the risk of the VA not being available anymore (dead, booked out,...) is just too good to pass up.

Instead we will probably see licenses for generated voices. And in case for games the game developer could make the voice model freely available for mods of his game.(The mods are already using assets from the game, why not also audio?)