Do you have any friends who still haven't tried Netflix? I was astonished to learn that my nurse at the doctor's office still hasn't signed up. I will not rest until she does.
I think it might be ignorance. I have to explain to them how it works. It helps if I show them the envelope, because it's hard for folks to imagine how easy it is. They think they have to get a stamp and address the envelope and buy envelopes, and all that old-school stuff. Even when I tell them it's postage-paid both ways, they are skeptical. They think there's a catch.
I also think it's hard work for some people to find stuff to watch. With TV, it's passive. You watch whatever is on, or you hit one button on the remote. Netflix requires a bit of thought and more effort than switching on the TV. You have to go online, look at pictures, and click a button. If you're really ambitious, you read the description and reviews.
Even with Roku, you have to decide what to watch. The TV doesn't decide for you. People can be paralyzed by choice. Well, Netflix solves that problem by suggesting movies. All you have to do is rate movies. Is that so hard?
I look at some of my Netflix Friends, and I'm frustrated at how few movies they've rated. Or maybe they really haven't seen that many. They must be the people with the social lives and beautiful lawns.