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
EBU Webinar
https://tech.ebu.ch/docs/events/webinar053_uhdtv/061213_uhdtv_webinar%20_final.pdf
ITU Rec.2010-1
http://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2020-1-201406-I!!PDF-E.pdf
Wikipedia Rec.2020
http://en.wikipedia.org/wiki/Rec._2020
Sony XAVC Specification
http://www.xavc-info.org/xavc/share/data/XAVC_SpecificationOverview_Rev2_2.pdf
Sony XAVC White Paper
http://www.sony.co.uk/res/attachment/file/05/1237491611305.pdf
Sony XAVC Information
Wikipedia, 4K Resolution
http://en.wikipedia.org/wiki/4K_resolution
Wikipedia, Optimum Viewing Distance
http://en.wikipedia.org/wiki/Optimum_HDTV_viewing_distance
Wikipedia, Ultra High Definition Television
http://en.wikipedia.org/wiki/Ultra-high-definition_television
Higher Frame Rates for Future Systems
http://downloads.bbc.co.uk/rd/pubs/brochures/ibc2013/ibc2013_higher_frame_rates_handout.pdf
SMPTE Standards Development Update: IMF (Interoperable Master Format)
4K Blur-ray discs arriving in 2015 to fight streaming media
http://www.cnet.com/news/4k-blu-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,
https://pro.sony.com/bbsccms/assets/files/show/highend/pdf/4K_Workflow_Guide_Version2.0.pdf
Codex Digital Workflows
https://www.codexdigital.com/workflow/camera-workflows