Yes, DLNA CVP2 is a HTML5 app and that requires webkit in Playstation platforms with multiple W3C extensions; Java, DLNA, WebRTC, WebTV, game Joysticks, Gesture and Voice control APIs and more that all DLNA CVP2 platforms must support. In addition bluetooth 4.01 is a standard to support Internet of things and game joysticks and more.Is webkit still coming?
Edit: Cable Labs Paper on DLNA CVP2 has everything outlined in fairly easy to read language
Sony in the PS3 uses GTKwebkit2 APIs and has since the Oct 2010 disclosure. In 2007 Sony sent a PS3 Development kit to Collabora who was integrating Gstreamer into a GTKwebkitthe HTML5 RUI browser implementation that is part of CableLabs’ CVP-2 Client. The HTML5 RUI browser uses WebKit  and GTK  at its core. CableLabs contributed extensions to WebKit to support DLNA HTML5 RUI requirements such as mapping of MPEG-2 TS elementary streams carrying TV services such as closed captions, SAP, ETV, and ad insertion.