http://techcrunch.com/2013/01/25/h265-is-approved/
This is great news, not only for 4K but for people with slow connection that want to be able to watch 720p or 1080p.With H.265, 4K streaming could be possible with as little as 20-30 Mbps of bandwidth. Still a lot by today’s standards, but not completely unheard of.