voice over/voice acting considered to be a separate industry?
It seems to be according to:
Voice acting isn't limited to voicing characters in cartoons. From the above link voice actors work on:
dubbed foreign language films
animation shorts or films
radio or audio dramas
toys and games
vehicles and transportation (e.g., GPS systems)
phone messages and interactive voice response (IVR)
training / e-learning
"Voice acting is the art of performing voice-overs or providing voices to represent a character or to provide information to an audience or user. Examples include animated, off-stage, off-screen or non-visible characters in various works, including feature films, dubbed foreign language films, animated short films, television programs, commercials, radio or audio dramas, comedy, video games, puppet shows, amusement rides, audiobooks and documentaries. Voice acting is also done for small handheld audio games."