Re: How is this going to help; cost to consumers
Computers aren't allowed to be 4K BluRay players. The spec REQUIRES dedicated players because they know PCs can't be protected end-to-end. As for the framebuffer, (1) by the time it's there the video data is raw, meaning gigabytes per second of data streaming through. It's gonna take some specialized hardware to handle the raw 4K stream at that level, and (2) it may be embedded in the display hardware to the extent that you have to undo something else to get at it. Like I said, protected hardware paths which includes significant tamper-resistance.
Put it this way. It's a LOT of hoop-jumping to rip a 4K film these days. I believe due to this most leaks are now coming from insiders.