With the new 4k Blu-ray system out in December, HEVC Advance doesn't seem to know what is doing, maybe Sony is trying to kill 4K quick this time, unlike Blu-ray which died a very slow death and $7 Billion in Toshiba's bank account.

http://arstechnica.com/tech-policy/2015/07/new-patent-group-threatens-to-derail-4k-hevc-video-streaming/