Good to hear from you again.2k di upscales are upscales.
You'll get some artifacts from filling the space with made up info, or whatever. Professionally done, or not. Ironically it's the simple scenes where you notice it. As there isn't as much differing material on screen to duplicate to hide the upscale. But 2k di upscales have more issues with contrast it seems. The thing you quoted has to do with discs and space and Dolby vision. I think if it's an upscale than they can easiler fit the dv onto a 66 uhd.
I just got a sound set up. It's nice.
I see what you're saying...but, as I asked above, why would this affect playback of the 2160 native source? See what I am getting at? In other words, the film was upscaled from a 2K DI to 4K in the DISC MASTERING process...but when it plays back through a BD player, it is sending out the FINISHED 2160 signal...It's a digital upscale. It's zooming in on a picture made of squares?