I have to admit I've never heard of a deafie having two TVs in the same room, but based on the posts I've read so far about using one TV for programs, movies or gaming and the other for VP, it makes perfect sense.
On a somewhat related note, I've been asked many times by sighted people if I own a TV given the fact that I'm blind. I have a TV in every room of my apartment: a 32 inch in the living room, a 19 inch in the bedroom, a 5 inch 1983 AM/FM/TV boombox in the kitchen and a 5 inch 1982 AM/FM/TV boombox in the bathroom. (In case you're wondering why I have a TV in the bathroom, I like to listen to TV news programs while I'm getting ready for school in the morning.)