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We've seen the 3-D hype, now we're moving into the backlash phase. More and more people are expressing concern/indignation about the onslaught of 3-D content.

Typical is this article from CNN that worries about short and long-term health effects of watching 3-D. There are some good points made, especially the fact that we really don't know what effect prolonged 3-D exposure has since people have traditionally only watched the duration of a movie in one sitting.

Also significant is the trend of 3-D hardware manufacturers to add health warnings to their products. Samsung's warnings about epileptic seizures, stroke, motion sickness, perceptual after-effects, disorientation, eye strain and decreased postural stability sound ominous indeed. However it's probably safe to assume that the warnings are based on worst-case speculation as much as actual research, in order to mitigate against any possible legal action in future.

If 3-D is to progress, this is a topic that needs to be investigated. Hopefully the major manufacturers will see the benefit of getting the research underway as soon as possible so this won't drag on forever.