That's cool. They work well. (I prefer the stereograms, but you need extra equipment to view those. I keep a stereo lens pair near my laptop though.)

If you pick up a digital stereo camera that creates .MPO files, I wrote a small app to create stereograms: https://github.com/EngineersNeedArt/Stereographer

i find it so easy to "switch" to 3D with pairs of images like this, it strikes me as strange that cheap stereo-3D isn't a standard interface element.

Other than getting used to making the switch, I don't think there is any cognitive load. Just pairing normal lens focus with a different triangulation distance, which is something we quickly learn to do without thinking when using any glasses or lenses.

I find it a lot more calming than Wiggle-D. And paired with some simple head/eye tracking via laptop cams, it could be really versatile.

The animated plots are great. Be great to have a trackpad rotatable version. (And the need/benefit for head tracking gets really obvious when I move. The perception of reverse/non-sensical dynamics is strong.)