The first real dose of non-proprietary 4K content is now available. Netflix confirmed that it has begun streaming 4K versions of its original series "House of Cards" as well as "some nature documentaries." The streaming giant's 4K plans were first revealed last year. Netflix's 4K streams are only viewable on 2014 4K TVs that include a built-in H.265/HEVC decoder. That includes most of the major-brand 4K sets announced at CES, the earliest of which are starting to ship now. Until now, the only way for owners of 4K TVs to view 4K content at home was via Sony's video player, which only works with Sony's 4K TVs, or YouTube, which offers a small selection of generally low-quality 4K clips. Samsung will also offer a similar proprietary video player that's only compatible with its 4K TVs. People who invested in a 2013 4K TV--against our advice--cannot view the streams .