New "Iwata Asks" interview here:-
http://iwataasks.nintendo.com/interview.html#/how-nintendo-3ds-made/
Interesting discussion about Virtual Boy on page 2. Also on page 3 it seems there was a prototype Game Boy Advance SP with 3D screen:-
Also, although we have known for quite some time that the GameCube could do 3D visuals, it wasnt clear exactly how this would have been achieved. Iwata explains that it would have used a 3D LCD screen accessory and that there was a 3D version of Luigi's Mansion fully playable:-Iwata:
Those products never saw the light of day.
Itoi:
Now that’s interesting!
Iwata:
For example, a sample screen used in the Nintendo 3DS to illustrate how you can see three-dimensional images without special glasses was functioning on the Game Boy Advance SP system.
Itoi:
Game Boy Advance SP? That’s the Game Boy Advance system that opens and closes, right? So…even before Nintendo DS?
Iwata:
Yes, that’s right. Making three-dimensional images that can be seen by the naked eye requires a special liquid crystal, so we tested it out by putting it in the Game Boy Advance SP. But the resolution of LCD was low then, so it didn’t look that great and it never made it to being a product.
In order to make images look three-dimensional without special glasses, you display the images for the left and right eyes separately, and deliver each one separately. To do that you need high resolution and high-precision technology. We didn’t have that to a sufficient degree back then, so the stereoscopic effect wasn’t very sharp.
Iwata:
To go back a little further, the Nintendo GameCube system actually had 3D-compatible circuitry built in.
Itoi:
Huh?
Iwata:
It had the potential for such functions.
Itoi:
Nintendo GameCube did? And all the Nintendo GameCubes systems around the world?
Iwata:
Yeah. If you fit it with a certain accessory, it could display 3D images.
Itoi:
What a secret!
Iwata:
Nintendo GameCube was released in 2001, exactly ten years ago. We’d been thinking about 3D for a long time even back then.
Itoi:
Why didn’t anyone ever know?
Iwata:
The liquid crystal for it was still expensive. Simply put, Nintendo GameCube could display 3D images if you attached a special LCD, but that special liquid crystal was really expensive back then.
Itoi:
Yeah, we’re talking about ten years ago.
Iwata:
We couldn’t have done it without selling it for a price far above that of the Nintendo GameCube system, itself! We already had a game for it, though—Luigi’s Mansion, simultaneously released with Nintendo GameCube.
Itoi:
The one in which Luigi shoulders a vacuum cleaner?
Iwata:
Yeah, that one. We had a functional version of that in 3D.
Itoi:
That was 3D?
Miyamoto:
It would jump out at you pretty nicely.
Iwata:
Even without special glasses, the 3D looked pretty good. But we considered how much the liquid crystal would cost, and it was just too expensive. We figured the market just wasn’t there for it.



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<- can someone please make this as a repro and sell it so me? 






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