Originally Posted by mark haflich
My comment are not based on the pressing costs but on the production cost of changing the color space. 4K is going to be increased bit length and wider color space and things have to be coded. But the market is tiny. What's the basis for producing something if very few will buy it. Commercial films now are digital.
Authoring/encoding software will need to be updated in any case, for h265, for 4K resolution, for wider color space, for higher bitdepths, for higher framerates and hopefully for 4:4:4. But all these things apply regardless of which delivery method (optical discs or online download) will be used. So I don't really see your point.
If they do try to make 4K Blu-Rays then I expect that they will probably try to keep the disc costs low. They could try getting along with the current physcial discs. Maybe 4K Blu-Ray players could just spin the discs faster to get support for higher bitrates. That alone might already suffice to make the current 50GB discs handle 4K 3D in 48p and wider colorspace just fine. Of course longer movies might then have to be split to 2 discs. Obviously I'm only guessing here.
If you look at this from the view point of CE manufacturers (Denon, Panasonic, Sony, Philips, Marantz, Toshiba, etc etc) they need a common standard to make devices for. The BDA consists of those manufacturers and the film studios, so the BDA will do what it can to make the CE manufacturers happy. The CE manufacturers won't be happy if every film studio now releases their own separate online delivery system. It just doesn't make sense for the CE manufacturers to create one separate playback device for every film studio. So either everyone has to agree on a common online delivery platform, or the BDA tries to get 4K optical Blu-Rays out. I don't see how the BDA could work on online delivery cause that would somehow contradict the whole purpose of the BDA, after all their very name contains the word "disc". If all film studios and CE manufacturers do try to get a common online delivery platform specified that would be a nice solution, of course, but I'm not sure I see that happening. We've not heard any announcements of talks about creating a new common online platform. Sony is doing their own thing. RED is doing their own thing. I guess CE manufacturers and the BDA might try to get 4K Blu-Rays working because that's in their best interest. The CE manufacturers want to build new devices they can sell to us consumers. Whether that is "cool" today or not doesn't matter as much.
I could well imagine that we'll see both 4K Blu-Rays and also some online delivery platforms at the same time. But I don't really know. I guess a lot depends on what the film studios want. If they don't want to do 4K Blu-Rays then the CE manufacturers can throw a tantrum and still not get their way. We'll just have to wait and see...