Even the best 3D technology that exists today is not really 3D. The basis of what I'm trying to say is that what we have now, even at its best in films like Avatar, is just a fancy pop-up book. These images are not in 3 dimensions, they're just flat images arranged in different layered depths, creating the illusion of a superficial 3rd dimension. The glasses utilize something called a parallax barrier to properly arrange the two projected images so that your brain can interpret the 3D elements.JLrep said:I think my examples are a bit more in line with 3D screens than yours are. As for the technological point, I admit I'm not an expert, so I'll ask, why would you need to invent a an entirely new form of optics and projection? The 3DS seems pretty darn close already. The only thing that needs improving is the viewing angles, and that doesn't need to be perfect, because viewing a TV screen at more than a slight angle is always annoying, no matter how clear it is. This business of "not within our lifetimes" seems rather extreme, as well. There are people alive now who can remember a time when electronic computers did not exist.
(And not to be OC or anything but if you replaced "android" with "robot", all your examples currently exist and are still being developed; it's just they're not as impressive as they are in sci-fi stories)
I'd like some source on that first claim. As far as I know, all you need to go from 2D to 3D is the ability to record and process two images simultaneously. As for the second, I don't think I said there was a low demand for 3D. I said that 3D that required glasses would never become mainstream.
Oh, really now, considering that reality is 3D, I'd absolutely say that 3D images replicate reality more than 2D images do. You make it sound as though 3D is only capable of rendering a couple of flat planes at different "distances" in some unnatural way, like certain magic-eye pictures (or, as you say, a pop-up book).
The "concept" I mentioned isn't mine, it's an observation by the neurologist and writer Oliver Sacks, though I've read many of his books and apologize that I cannot remember where it appears.
I, uh, feel as though you're supporting my point now, though. You pointed out that our brain is confused by that optical illusion because, while the picture is technically flat, our brain insists on perceiving it as having depth and so accepts the misleading visual cues. This is confusion that is not present with 3D; in 3D, that illusion wouldn't work, because our brain has actual depth data to use, and doesn't have to assume (by "actual" I mean the two eyes actually seeing two different images, which is what stereoscopy is). I've seen movies and images in 3D, and gimmicks aside, I'd absolutely say they look more real than 2D images (other than the red/green ones I mean, those never look natural).
Likewise.I know its a long post but I feel this is an interesting discussion and absolutely worth having.
As for the 3DS its assumed that it uses the same basic technology, except due to the small size of the screen and the fact that only one person will be viewing it from one angle it is able to place the parallax barrier directly onto the screen. You're basically still using 3D glasses to view the image, they've just placed the 3D glasses onto the screen rather than onto your head.
There is no technology that exists to create a lifelike 3D image without using a parallax barrier to trick your eyes.
Basically this is the closest we've come to creating a true 3D holographic image.

I think you'll agree that the technology on display there isn't exactly ready for an in-home 3D Gears of War deathmatch. You may say that creating the kind of technology that would utilize full 3D holograms for entertainment purposes would be impractical, confusing, and ultimately a waste of time. I say the same thing for the current generation of 3D movies.
Like I said the current method of 3D will pretty much always require a parallax barrier (ie goofy glasses), thus the current generation of 3D will never become mainstream. New technologies would have to be invented and I don't really see any evidence that such technologies are even being heavily researched, especially not by the entertainment industry.