Ok, a couple questions/thoughts.
On the LED panel in a home theater. As mentioned, everyone has to make their choices, and those of us with front projectors have always made choices and even sacrifices, whether it be lower resolution, less brightness, no windows in the room, etc. That said, I can watch a 75" TV in my living room, which is not an immersive experience. I'll take the 138" diagonal 2.35 over it any day. Not to mention that I've yet to find that acoustically transparent flat panel to put my speakers behind.
About 9 months before I moved into my new house, my Infocus broke and I didn't want to buy a new projector until I knew what I was going to be getting in the theater, so dropped down from a 118" 1.78 screen, to the 70". It was ok, and fine for TV, but when it came to watching movies, it just wasn't in the same ballpark. In the past week, we've watched Salt (UHD), Love the Coopers, Creed, Evererst and a few other movies. There is no way that a 75" TV is going to put you in the movie, the way a big screen does. Watching Everest with the 10.5' wide screen and Atmos sound, makes you almost feel like you are on the mountain.
Anyway, my questions as it relates to the Samsung UHD and our sony's.
1. 4:4:4 vs 4:2:0. Ok, so as I understand it, the 600 will only handle 4:2:0. On the Samsung, the choices are 4:4:4 or RGB. When looking at my Marantz when watching the Kaleidescape, it's sending 4:4:4. So, if the player sends more than the display (projector) can handle, does it deal with it gracefully or is that a problem? Dropping down to RGB doesn't seem ideal.
2. It seems like HDR is handled automatically in the player and there is no option for turning it on or off. However, there is HDMI deep color, which can be on/off/auto. My understanding of this is for color beyond 8 bit. The Sony will only handle 8 bit correct? So, is my safest bet to turn HDMI deep color to off?
As to the one movie I watched, Salt, it was hard to do a good A/B between it and the Kscape version, because every time I switched away from the Samsung, it stopped the movie when it sense the HDMI change. So, I would have to restart and resume, which is a 15 second or so process. My impression watching it and some of the A/B's I did was that the color quality was pretty much the same (some have complained of the UHD's looking "off"), but that there was more detail in some scenes, especially closeups of faces and things like that. You know the whole HD phenomenon of seeing the pores on a person's face, wrinkles, makeup lines, etc. My sense was that more of those facial features and similar details were evident. However, without a good and quick A/B or maybe some good photos of exact same shots, I can't be sure that what I think I'm seeing, I'm seeing.
As has been noted, the Sony is so good with upscaling, that the benefit might be limited, especially when they don't have the 4k DI (that Salt did have from film), but still, since my screen is both large, I'm close and using the zoom method, I'll take any increase in resolution I can get. Beyond the resolution, it looks like UHD is going to bring us more Atmos tracks than on Blu-ray, which is both a bonus and pisses me off.