Why 3D doesn't work and never will.
As much as I hate the recent spate of 3D movies, I don't think it has anything to do with the technology, but more about how poorly it is applied. I say this because Avatar, at least for me, was simply mind-blowing; it was easily the most immersive film I've ever watched, but mainly because the 3D was done tastefully, subtly, and with care. You can give me as much hand-waving sudo-science to try to convince me I'm not supposed to have liked it, but it won't change my mind; Avatar in 3D literally brought tears to my eyes.