The article was published in September 2018, when the 4K version wasn't yet released. Still, the author seems to have been aware of it. From one of the quotati

The article was published in September 2018, when the 4K version wasn't yet released. Still, the author seems to have been aware of it. From one of the quotations in the article: "Even beyond Kubrick's grave, Vitali continues to work to preserve the director's vision. For the current re-release of 2001: A Space Odyssey (1968), Vitali color timed the 70 mm print that's being screened in theaters. He also worked on the color timing of the 4K transfer which will be coming to home video soon."