Dialogue focuses the reader on a given scene, because it forces the time to slow down. At the same time, because it uses so little space, dialogue reads very quickly. This is close to dialogue in that it picks up the nuances of a person's speech, and reveals the person, but it is not the same. Dialogue is an exchange. It takes more than one person.
Television is the opposite.
It's a smaller venue, and what's said becomes really important. A lot of that show was nothing more than women sitting around talking, recollecting, telling funny stories. When I managed to nudge his car into the curb and approached him, he actually smiled at me. He was a dithery old man who clearly should not have been driving. I told Kathy to call a cop and she dug into her purse for her cell phone while I tried to make the old man understand what he had done.