I was perusing my email lately when I noticed Anime Ltd (All the Anime) advertising a 4K UHD (Ultra-High-Definition) release of Weathering With You, the latest (as of this article) Makoto Shinkai film. This got me thinking about whether a 4K resolution release for anime is truly important or not.
To discuss this topic, I should first explain how animating anime digitally affected resolution. It has been traditionally much easier to create HD masters for media produced on film and media produced digitally in HD. However, the late 1990s/early 2000s saw anime created digitally in standard definition and the problem with digital is that, once you have created the master, you cannot create a native resolution higher than the original. A good example of this is Cowboy Bebop which saw the 2D elements animated on film and the 3D elements animated digitally. When the blu-ray was released, it became quite clear that, while the 2D art and animation looked very sharp and clean, the 3D elements had a less graceful appearance.