This really is a fantastic video. I don't think I'd considered many of the ideas behind dithering before seeing how it could be extrapolated to this degree.

The video ends in a place where I suspect even further advances could still be made.

There's a follow up video with variations of the technique (some of them with color) demonstrated in a game: https://www.youtube.com/watch?v=EzjWBmhO_1E

But yes, there's still the issue of oblique angles looking different that still remains open AFAIK.