Well executed and could be very useful. Shouldn't be too hard for Apple to implement this for its Photo album with is Apple Intelligence.
With this, my feeling is that nowadays people are doing "research papers" with nothing as content. Like something that would be a basic blog article or a small implementation project of anything.
Unfortunately not new at all. What's new is the richness of the presentation work, for sure. And the self promotion on HN. And the publication of the code should make this far, far more useful than the equivalent of the past which never did... Oh wait, no, the code isn't there - only the link.
And yet the ability for me to annotate useful information in popular platforms is still (at best) free form tags or written descriptions.
but, how good is it at sorting my memes
No so much memes, but I use searching by location and/or date very useful in my iPhone photos, but that doesn't work nearly so well for screenshots. I don't think there's a decent technological answer to that though, I'd have to add the sort of metadata Photos relies on from exif data everything I capture a screenshot for that to be any use.