It's like a really well-done, high-resolution take on those lenticular plastic 3D images. It does look truly volumetric as long as you're kind of roughly in front of it. But if you go too far off to the side the effect breaks down a bit.
Inexpensive 3D displays that don't require eye-tracking a la the Nintendo 3DS would be quite a nifty development.
However the advantage of eyetracked lenticular over "The looking glass" would be resolution. (there might be other FOV and effect distance advantages as well)
In the end the satisfaction level needs to be evaluated experimentally of course, I wonder how nice one would be with current technology (say, an iPad Pro display), did you build a prototype?
However, this seems like a poor strategy: most people already know 3D (binocular) displays and there's not much demand for it, I bet few people would be willing to pay significantly more for lower quality just to get rid of glasses (for those who even crave binocular content). Compare to the potential of having wide viewing angle holograms (even if a little fuzzy) in your living room.
Unrelated: Your blog posts are awesome and you should submit more often to HN ;)