Es el 4K por streaming mejor que el 1080p de un Blu-ray en terminos de calidad de imagen:
What is HEVC? High Efficiency Video Coding, H.265, and 4K compression explained - CNET
Esto es mas o menos lo que yo afirmaba hace unos días, que el 4K en bajo bitrate (como el que emite netflix, como los videos de youtube) tienen peor calidad de imagen que un Blu-ray. Repetimos: MAYOR RESOLUCIÓN NO ES IGUAL A MAYOR CALIDAD DE IMAGEN NECESARIAMENTE.While this arrangement offers flexibility, it also means that "4K" and "UHD" won't necessarily guarantee better picture quality any more than "1080p" or "HD" do today. A highly compressed 4K signal could, in many ways, look worse than a less heavily compressed HD signal.
In other words, streaming 4K might look worse than current 1080p Blu-ray, depending on how much compression is used. With Netflix now streaming "House of Cards" in UltraHD at 15.6 Mbps, initial indications speak of 1080p Blu-ray looking "cleaner," confirming some expert predictions. The likely reason? 1080p Blu-ray has a lot more bandwidth to devote to video than online streaming, more than compensating for the discs' older compression scheme.