Facebook founder Mark Zuckerberg says virtual reality is the future, but Apple's boss Tim Cook dismisses it as niche tech. Who is right? Plus, not so long ago, Silicon Valley could seemingly do little wrong. But is the political and cultural tide turning against the US tech industry's "disruptive" behaviour? We ask Phil Libin, founder of the AI startup studio All Turtles and the man behind the Evernote app. And, in the week that Ada Lovelace Day celebrates women's contribution to science and technology, we chat to female winners of the TeenTech awards about their ambitions. Presented by Rory Cellan-Jones, with BBC tech reporter Chris Foxx, and special guest Madhumita Murgia, European technology correspondent for the Financial Times. (Image: Woman trying out Oculus Go VR headset, Credit: Facebook).