the claimed high bitrate of K. (They don't tell us the bitrate we have to believe them)
They tell us the file size on the web version of the store. You can confirm the accuracy of these with a little investigation and simple math.
I can download a 90 min film in 4K HDR in about 10 mins at 900mbps.
900mbps x 60 seconds x 10 mins = 540000 mb or 540gb
1 byte = 8 bits, hence 540gb / 8 = 67.5 GB is the complete file size.
Let's assume the average bitrate for a lossless track is 2mbps
2mbps x 60 seconds x 90 mins = 10800mb then 10800mb / 8 = 1350mb or 1.35GB.
Let's assume 3 lossless audio tracks included in the file, 1.35GB x 3 = approximately 4GB file size for the audio tracks.
Now subtract this from the complete file size and subtract another 2GB for metadata to find the approximate size dedicated to the video portion.
67.5 GB - 4GB - 2GB = 61.5GB.
Let's calculate the bits for the video from this,
61.5GB x 1000 = 61500MB, then 61500 x 8 = 492000mb
Now let's calculate the average bitrates,
(492000 / 90 minutes) / 60 seconds = approximately 91.1mbps.
If you run a projector with a big screen I agree K has better video quality over streaming but not by much. The audio is better on K.
This is subjective on whether you care more about the fidelity of the image as in the case of higher bitrates (Kaleidescape and Blu-rays) with much higher native detail and color accuracy or in the case of lower bitrates(Streaming) with the lack of detail and the color pop compensated in the post processing* at the player or the display.
*interpolating pixels (upscaling), chroma upscaling and contrast boost (edge enhancement/ sharpening).
It is also highly dependent on how large your display is and how close you sit from your display. There are many references online for the optimal seating distance to your display.
Imperfections(deficiencies) will escape your eyes if they are not trained to find them. Once you start noticing imperfections in your image, it will be very difficult not to see them.
It is true DoIby Vision can be superior to HDR in some setups. There are remedies such as Lumagen Radiance Pro and MadVR Envy then the level is field. In my case, HDR is the icing on the cake but not the cake itself. In other words, HDR doesn't matter to me if the image lacks native detail, color accuracy and it has unacceptable level of compression artifacts, artificial sharpening and contrast boost.
I am unfortunate that I have already started to notice the deficiencies in the streaming media, my eyes are always drawn to them. I will be forever locked to Kaleidescape or disc media until something better comes along.