I have both the BD and the UHD sets of Season 1, and after watching Ep. 1 of UHD (Oppo UPD-205, LG OLED 65", Dolbyvision), I was initially disappointed that it did not have the "Fury look"... the look of a 4K+ capture and 4K DI, and I started the Amazon return process. As an afterthought, I watched the BD versions of Season 1 Ep.1, and I knew from the initial 60 seconds (raising the gate through the Wall to go North) that I had to cancel the return of the UHD. I have returned other "fake 4K" releases ... but HBO worked transcoding magic on this set. The detail in the snow, for instance. In the BD, the snow in the North looks like snow... in the UHD, the snow looks like fake snow if you study it. The detail in the face of the Wall, from dripping icicles in the Wall tunnel, the detail and lighting effects on fleshtones, are dramatically better in the UHD, esp. the high contrast scenes, e.g., candle-lit rooms. The excellent upscaling in the Oppo of a BD source falls far short of what the UHD in the same player does. I wouldn't believe fake 4K could look this good unless I saw it with my own eyes.