Hi Mark and Ken.
I totally understand what is being said, I haven't misunderstood anything. I have already said that certain 4K equipment and methodology can and will look better in HD, compared to the same in HD.
Mark, you mention cell phones, I doubt very much that these are going to do battle with any proper HD camera when scaled down.
And using DSLRs as an example, is also not very good, as many do not resolve HD in the same way a dedicated camera would.
I do agree however that 4K footage to 4K monitoring is a potential issue, especially with monitoring that doesn't play well with certain frame rates and codecs. That is where a good media player will really help. But as I said earlier, early adopters will feel the pain of a lack of compatibility, and whether it's right or wrong, a media player will be needed for those scenarios. Newer and future 4K monitoring won't have such issues, and will not need such devices.
Again as I said earlier, there are many issues to take on board when evaluating picture quality, aliasing being a big one. It's an issue that does effect the quality of down scaling 4K to HD, and it is nowhere near as bad on a sensor that maps 1:1 in the first place at any given resolution, in this case HD to HD.
The likes of bit depth and chroma sampling play a lesser part in the evaluation process. Seeing as any native or scaled content will be subject, in the vast majority of cases, to the same output parameters. Namely, 8bit and 4:2:0.
And Mark. You mention the word argument. May I just correct you on that, it's not an argument from me, it's simply me pointing out that you are not entirely correct. While your observations are indeed true in many cases. You use a broad stroke of the brush to paint an over simplified picture of a scenario that really isn't so black and white. Again, as I said earlier. These issues will resolve themselves in the future to be more black and white and as a matter of fact. But for now, a little caution should be exercised.
I have to agree with your statement. But that is hardly a surprise when taking on board the views of someone with your practical experience of "Tech And What Not"