High-res pixel art is tough - to create, and sometimes to enjoy. When the goal of pixel art is to create something interesting when imposing resolution constraints, the significance of a single pixel is reduced when working with such a high resolution.
Further, if the viewer's display is _close_ to the art's native resolution, but not at least one integer multiple higher, the art is going to be smeared as no scaling technique will deal with such a small scaling transition well.
With that in mind, Auro looks like it'd have trouble looking good on any of the devices it was intended for, and indeed looking more like aliasing ("pixellation") to the average user. The author acknowledges this in the article: "Some devices blur Auro. Some devices stretch it. Some devices letterbox it. No matter how hard I worked to make the art in Auro as good as I could, there’s no way a given person should be expected to see past all those roadblocks."