Releasing anything in 3D just makes me avoid watching the movie entirely. It shows how much attention has been put into the effects over the story. Avatar was basically a poorly told whacking contest to see who could throw the most shit into the audience as possible. It is a dated and tasteless form of technology. Since we basically see 3D in regular films with a special little thing called our minds, we don't need extra help. All I ever thought when I saw a 3D movie was, "Ow my eyes are giving me a headache."
Keep it in amusement parks, but keep it out of the theater and give films with a good story a chance again.