During his GDC 2013 keynote, Sony’s Senior Staff Engineer Chris Norden gave an overview of the user experience the company intends for PlayStation 4 users to enjoy.
The key concept behind the new user experience, which Sony calls Connected UX is having "everything and everyone" connected.
Connected UX is based on five key principles: simplicity, immediacy, social connectivity, mobile integration and personalization. This means that the Connected UX should give its users immediate access to social networking features without requiring much user interaction beyond pressing PS4’s "share" button. Norden didn’t elaborate on Connected UX’s mobile integration, but he did say that it will integrate with PlayStation Vita, smartphones and other platforms.