Standard Ultra HD is not yet widely used and the availability of content at this resolution is not too big at the moment, but it will change over time. It was therefore considered necessary to develop the official specification of the Ultra HD Blu-ray standard, which was just presented in the final version.
The amount of content available in the 4K standard is still growing, to which Netflix, Amazon, and YouTube are contributing, but so far they are mostly available in digital. In the near future, however, we can count on the appearance of movies and series on Ultra HD on physical media, ie Ultra HD Blu-ray discs, whose specifications have just been completed.
Standard Ultra HD Blu-ray is not only compatible with Blu-ray Discs, but offers a resolution of 3840 x 2160 pixels as well as support for next generation audio formats such as DTS: X and Dolby Atmos. It will also provide more color, HDR support and more image smoothness. The media that currently holds 66 GB or 100 GB of data (ordinary Blu-ray discs can hold 25 and 50 GB of data) is required as high-definition video and audio take up a lot of space on the disc.