Speaking at SXSW, Tim Berners-Lee stresed that the web needs to stay open, but he also defended proposals to add a DRM component to HTML5 to prevent people from going back to using Flash:
Web apps, in turn, comply with Berners-Lee's "principle of least power," a rule of simplicity, security and interoperability he defined as "If you're going to transmit something, you should use the least powerful language that you can."
He is not, however, an absolutist. During a post-talk Q&A, he defended proposals to add support for "digital rights management" usage restrictions to HTML5 as necessary to get more content on the open Web: "If we don't put the hooks for the use of DRM in… people will just go back to using Flash."
Berners-Lee's biggest fear is not a mobile experience dominated by iOS or Play Store apps, but one in which the basic protocols of the Web are eaten away by ISP interference and state surveillance.