I replicated Jonny lees demo to see how it looks in person but soon learned the problem is one of optics. Without presenting the content at the right focal depth you don’t get past accommodation and binocular convergence conflicts. Without shutter or polarized glasses you also don’t get past binocular cues - so it looks great on a video where there is one camera view but once you add a second human eye it stops looking 3D.

I started a company to try to solve these problems without using head mounted displays and we developed 3D displays that work using an array of rectangular lenses and micro displays plus fresnel lens sheets. We adopted this approach to a new product category we called virtual skylights where we replicate the look and feel of an open sky with a distance sun above you. As you walk around a room the sun will follow you in the sky across units due to the optics and there is no need for active head tracking for this particular case. The effect is really amazing even though the content in this case is super simple. Hard to experience on a 2d screen but we have some videos of it here, in the reaction video you can see how people react to seeing it the first time.

https://www.innerscene.com/a7/videos