I think you make some good points. This of course depends on whether you actually like watching movies in 3D.
There is a substantial portion of the population that simply does not like watching 3D. I unfortunately am one of them. I went and saw Tron: Legacy at the movies in 3D, own the Blu-ray (both 3D and 2D blu-rays), and have seen it play on 3D sets. The following is of course just my opinion so people get a different experience and reward from watching 3D. I respect all opinions.
The main reasons I enjoy watching 2D vs 3D:
1) Hate wearing the extra set of (sun)glasses.
2) The picture fidelity is decreased. This has been noted on 3D reviews, the 2D versions simply appear more sharp, better contrast level. This most likely is likely from left and right eye frame bleeding as the glasses are not able to block out 100% of the other frames light.
3) Huge drop in brightness. Inherent to 3D technology that uses either polarized (usually at movie theaters) or active shutter (most home TV's) is that 50% of the light is blocked to the eye at any one point. In actuality, the light decrease can be substantially more due to the technology, even up to 88% according to a reference I found linked below. That is really a big drop. Your essentially watching the movie with sunglasses on.
4) It gives me eye fatigue. After about 2 hours of watching I just want to tear those glasses off. Some people experience pain and nausea with the glasses, luckily I don't get that. But my eyes just feel really tired after about an hour of watching.
5) 3D does not look real. It's not real 3D. And this is because they have not fixed the issue of eye convergence (known as accommodation). In real life, if you look at a far away image vs close, not only is the image on different parts of your eye, but your actual eyes point closer together or farther away (like being cross eyed). With 3D movies, you get the different image locations, but your eyes are at the same angle (at the point of the screen). This is unnatural and your brain knows that something is wrong. Until they fix this issue, 3D will always look fake (to me). Ask your parents, they were watching polarized 3D films in the theater when they were growing up as well. The fundamental technology is the same (granted improved over time).
6) This does not happen to me, but about 10% of the population actually does not process 3D movies and they see a 2D picture even with glasses. Another 30% of the population has "weak" stereoscopic vision and perceive the 3D image to a lesser degree.
Once again, these are my personal opinions. I love watching movies (especially Tron: Legacy) on my big screen in the dedicated home theater room. But I decided to go 2D as I still view 3D as a gimmick. Simply one that we forgot was already tried 50 years ago in the theaters. IMHO.
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