The PlayStation 4 will not support client functionality for media servers, Sony announced today in the Ultimate FAQ for the console on the PlayStation Blog.
The FAQ also confirms the Sony's next-gen console will not support DLNA devices for sharing and streaming videos and other media content from a home PC. Sony's PlayStation 3 does include DLNA support and allows users to access their PC's media from the console's dashboard.
Earlier this year, Microsoft noted that the Xbox One will not work as a Windows Media Center Extender, which would have allowed users to connect multiple devices running Windows. DLNA support, while possible on the Xbox 360, is still unconfirmed for the Xbox One.