Sony showed off 4K television displays running at a resolution of 3840 × 2160 at CES 2013. To complement this, Sony Electronics president Phil Molyneux says they're working on a digital service to offer the content on both the PS4 and through the televisions themselves, since there is currently not a standard of physical media that can support a movie with such an advanced resolution.
"The size of a typical movie, depending on the length of the movie, you're talking a 100 GB plus," said Molyneux. "Then you come into variables: how fast is your broadband at home or do you have optical broadband like they do in Houston, Texas, where you can get the movie down pretty quickly. So, that is one of the challenges that we have to work through. Looking to the future, we need to develop as an industry new compression ratios and technologies. That dialogue is an active process for us at the moment."
"Consumers are used to download and streaming,” he added. “I don't want to discount the good work that's going into potential physical media distribution, but that's an industry association and they're working hard.”
Source: The Verge