Apple TV 4K Review: So Close, So Far
theverge.com
theverge.com
I have a "niche" device called the Nvidia shield, and it does not support per-app switching either. It is slated for Android Oreo though, but until then I am running the shield on 1080p and just watch 4k netflix on lg smarttv.
Tbh, I would feel better if mode switching wasn't required at all, and Android and apple would invest in truly great upscaling techniques that can rival the native TV capabilities. The problem is, that I can't really as a consumer quantify if the upscaling is up to par, and rather assume that the TV is always better.