This is a very interesting thread. All of you make some good points and it is fun to read what you are saying.
I'd like you to look at Oxford's definition of art:
The expression or application of human creative skill and imagination, typically in a visual form such as painting or sculpture, producing works to be appreciated primarily for their beauty or emotional power.
In that definition, I would say that Dallas qualifies. And here is an example of what I appreciate about the art of Dallas:
Look at how much thought went into setting up this scene. Notice that even if you know nothing about the scene, you can tell that Jock is the man in charge of this conversation.
Look even at the choices the actors made for this shot. Jim Davis is already tall, and he adds to this his cowboy hat, drawing your eye up towards the sky and making him appear larger than life.
David Wayne goes the opposite direction. Bundled up, hunched over slightly. Notice Digger's hands as well. He isn't holding a drink, and his arms are tight against his body as if not drinking is making him physically uncomfortable.
Also, look at the trees in the background. They are only dormant, but they look dead. And notice the clothes they are wearing-- drab colors. This is interesting considering that they are together for a happy occasion-- Pam is on the nest!
The beauty of this artwork is how it makes you feel-- you can almost feel that sense of foreboding, and of course we now know there is a reason for it.