Phones, tablets, desktops are among the interfaces supported by Ubuntu via the recently-announced upcoming converged experience.
Logging into Ubuntu, the user is immediately faced with content, opening the Dash, various lenses and categories reveal images, video-clips, text documents, folders, etc, overall content clearly exposed in the Dash.
Yet, with the converged experience and Ubuntu's future cross-form-factor capabilities, the content (and sharing content) becomes crucial as a link (as shared or not) between phones and desktops, tablets and TVs, etc.