I agree on distance but there is a massive difference between an 8" device with 300+ PPI and one that's 224~ PPI, and if I'm getting a slightly larger device I'm going to want it as sharp as possible, it's a bit like having a 27" monitor - they look dreadful at 1080P, and I think they're only just good enough at 2160p which is generally 163 PPI - now you can really see the difference between that and a 27" 5K display at 218 PPI which lots a lot clearer.