As for 4K video (not just games) support with the PS4. Sony has announced a 4K movie download network/player to go online mid-2013 and it's certainly possible the PS4, which may not ship until 4th quarter 2013, will support this service. The Blu-ray Disc Associate created a task force in Oct. 2012 to investigate the feasibility of several technical upgrades to Blu-ray, including support for 4K discs. Even if the task force recommendations, whenever they come out, say that 4K is technical feasible the BDA would need to agree to go ahead and develop the the standards for 4K discs. We are probably looking at 2014, at the very earliest to have such standards complete. There were BD related standards, completed in 2010, for BD-XL which defines the format for 3 and 4 layer BD-R and BD-RW. I suspect that if a BD-ROM drive is designed to play back BD-R discs that have been recorded with 4 layers as per the BD-XL spec. then they will probably also be able to play back future 4-layer commercial BD recordings. If Sony is able to get a BD-ROM drive into the PS4 that can handle future 4 layer discs then it is possible there will be an upgrade path (via firmware) to add support for Blu-ray 4K discs if and when they become available. Even if there is no support in the PS4 for 4 layer discs, it may be possible to get high quality 4K video on the current 50 MB dual layer discs. Redray is doing 4K video at a average data rate claimed to be 20 Mbps which is less than many 1080p Blu-ray titles today. Any discussion of getting 4K video support with the PS4 assumes it does already come with some basic 4K hardware support including the HDMI interface chipset and the graphics processor.
Blog + Reviews + Articles: projectorreviews.com