Newsweek.com: Why I Hate 3-D (and You Should Too)

3-D is a waste of a perfectly good dimension. Hollywood's current crazy stampede toward it is suicidal. It adds nothing essential to the moviegoing experience. For some, it is an annoying distraction. For others, it creates nausea and headaches. It is driven largely to sell expensive projection equipment and add a $5 to $7.50 surcharge on already expensive movie tickets. Its image is noticeably darker than standard 2-D. It is unsuitable for grown-up films of any seriousness. It limits the freedom of directors to make films as they choose. For moviegoers in the PG-13 and R ranges, it only rarely provides an experience worth paying a premium for.

I agree with everything Roger Ebert has to say about 3-D films.  I love technology and its use in films is good if it can advance a story and bring a meaningful new experience.  I think in the right hands, like James Cameron with Avatar it can be beautiful, but with others it is just another noisy visual special effect.