Replay: Here's a really useful infographic about all things 4K/UHD [first published October 2014, updated August 2016].
The 4K/UHD juggernaut doesn't show any sign of going away. Here's a collection of all the latest information from the industry, very kindly provided for us by Ben Dair. (There's a list of references below).
To see the original, go to Ben Dair's website, here
Sony XAVC Specification
Sony XAVC White Paper
Sony XAVC Information
Wikipedia, 4K Resolution
Wikipedia, Optimum Viewing Distance
Wikipedia, Ultra High Definition Television
Higher Frame Rates for Future Systems
SMPTE Standards Development Update: IMF (Interoperable Master Format)
4K Blur-ray discs arriving in 2015 to fight streaming media
H.265 benchmarked: Does the next-generation video codec live up to the expectation
Sony 4k Workflow Guide Version 2.0,
Codex Digital Workflows