Try these:
http://presscentre.sony.eu/Content/Detail.aspx?ReleaseID=8820&NewsAreaID=2&ClientID=1
http://www.stereophile.com/content/sony-push-hi-rez-downloads
http://www.gramophone.co.uk/blog/high-fidelity/at-last-high-resolution-audio-is-about-to-go-mainstream
http://www.whathifi.com/blog/ifa-2013-sony-puts-the-focus-on-hi-res-audio-and-4k-tv
http://www.ecoustics.com/products/sony-hap-z1es-s1-digital-music-players/
http://www.sci-tech-today.com/news/New-High-Res-Audio-Gear-from-Sony/story.xhtml?story_id=012001GT2N9C
http://presscentre.sony.eu/Content/Detail.aspx?ReleaseID=8820&NewsAreaID=2&ClientID=1
http://www.stereophile.com/content/sony-push-hi-rez-downloads
http://www.gramophone.co.uk/blog/high-fidelity/at-last-high-resolution-audio-is-about-to-go-mainstream
http://www.whathifi.com/blog/ifa-2013-sony-puts-the-focus-on-hi-res-audio-and-4k-tv
http://www.ecoustics.com/products/sony-hap-z1es-s1-digital-music-players/
http://www.sci-tech-today.com/news/New-High-Res-Audio-Gear-from-Sony/story.xhtml?story_id=012001GT2N9C