The GoPro Hero 3 Black 4k camera records in 12fps 4k but needs their Cineform editor to convert it to something useful. I'm thinking that there may be a two-level use at home surrounding broadcast that is a while out. GoPro's and their brothers for home use below the broadcast advancements and downloading above the broadcasters. Channel bandwith is their roadblock anywhere you look. My broadcaster friends are rushing headlong to 4k equipment for recording knowing they will have to dumb down to 1080 for air but they know that. A nice place to keep up with 4k news is;
http://sportsvideo.org/main/
And my Ben Hur blu-ray is like I never saw the movie before.