Although I like the idea of movie distributers shifting from REC709 & 4:2:0 to REC2020 & 4:4:4 for 4K video, expanding that color depth will come at a cost of 33% more data capacity needed per pixel and more severe levels of lossy video compression. I guess I'll have to see it to believe it with H.265 HEVC boasting much greater encoding efficiency over H.264 AVC.
The Blu-ray format is now several years old. In its early days a good bit was being said about "deep color" and what Blu-ray would be doing in the future. We've seen a couple revisions made to HDMI and various generations of HDTV sets come and go, but I'll be darned if I've ever seen a movie on Blu-ray encoded with "deep color."
4K is better than 2K, but 4K has some hurdles to jump.
Hollywood movie studios are still producing too many movies in 2K resolution. The Arri Alexa is one of the most popular feature production video camera systems available, but it doesn't shoot footage in 4K (native resolution is 2880 X 1620). Most digital intermediates are still renedered at 2K. Some movies are being produced in 3D 2K rather than 4K. Advances in computing technology make it easier than ever to produce a movie in 4K, but I think studios are using those same leaps in computing power to do 2K even that much faster & cheaper.
Too many movie theaters are equipped with 2K projection rather than 4K -and this includes all of those IMAX Digital theaters (a.k.a. Lie-MAX). I think 4K needs to make some big strides in commercial cinema to build public awareness about the difference. Right now most customers aren't aware of any differences. Many don't even understand the difference between SD and HD -which is why so many new TV sets are fed SD signals and put into stretch-o-vision.
Residential Internet connections should be a whole lot faster than they are today. Unfortunately telecom giants have been pouring a huge fortune into improving mobile phone infrastructure while doing as little as possible with residential lines. In order to stream YouTube quality H.264 1080p HD material in real time with no hicccups one needs a connection that sustains 8 megabits per second or more. Not many people have that. 4K H.265 streaming in 4:4:4 would, no doubt, require a significantly faster connection.
I think physical media (like optical discs) will be needed to deliver 4K movies to the public anytime in the reasonably near future. I don't know if that can be accomplished with the Blu-ray platform. But I hope it can.
If 4K UHDTV movies have to be delivered on an entirely new video format odds are high we'll see all kinds of legal delays coming from movie studios, lawyers, etc. regarding licensing fees, copy protection, etc. Some of those hassles might be avoided if the Blu-ray format can continue to be used.
Edited by Bobby Henderson, November 22 2013 - 11:07 AM.