I know what you mean by 3D, stereoscopy. While 3D televisions don't have that much of a market, I recall Sonic Generations had the feature.
When my local cinema was going through a 3D-cinema phase, I did purchase a pair of 3D glasses that had shades instead of anaglyph red/cyan lens, they seem to work even better. My cinema no longer show 3D films. I kept the glasses, but I don't think they work on regular television screens.
An alternate way to watch 3D films is with VR, when my Oculus Rift S was working fine, I had this app for it that simulated a cinema and allowed me to watch movies made for 3D viewing. Glasses were not needed, given the app fed my eyes the stereo-vision for each of them. I never tried 3D gaming with it.
I haven't tried playing Sonic Generations's stereoscope in VR, but i know it's possible. So with a VR headset, it's possible to play non-VR stereoscopy games and movies with it.
Yes, stereoscopy, that's the word.
The beauty of 3DS is we don't need any glasses to watch it, the hardware has already contained it.
The drawback was ... yeah, it's a handheld so the hardware was really limited given its size.
Even M2 said porting 2D games like Sonic 1 weren't easy because they had to separate layer by layer to support the 3D feature / stereoscopy.
For 3D games, the most notable example was Sonic & All-Stars Racing Transformed.
It was a downgrade compared to PS Vita version (which look and play the same as console version),
but hey, at least it's unique, it got a stereoscopy.
Also 3DS has a camera function that let us watch 3D movies in computer / television with it.
Not a fun way to watch though but just saying that it's possible.
And other good thing was eshop also provided many 3D movies.
They're mostly animated movies though like Big Hero 6, The Lego Movie, Up, Wreck-It Ralph, Shrek Thriller Night, and Shaun the Sheep.
I don't think I ever watched live action ones other than trailers (Ryan Reynold's Green Lantern trailer is the only thing that I remember).
