Thanks for both these extra links -- I missed the previous HN discussion (of the paper) due to searching for Van Gogh / Picasso rather than anything else.

Whilst I agree the Washington Post article is rather lacking in technical details, it does provide a pretty nice visual idea of what the paper is about, which I think helps (and this comment thread means people can now find the paper very easily too!).

Also https://news.ycombinator.com/item?id=10157750.