Tech Tent 24: Silicon Valley disruption

In a special episode from San Francisco, Google's Director of Engineering Daniel Singleton explains why smartwatches powered by its Android operating system will make a difference. Uber is the company behind the smartphone app that connects passengers with drivers. It has only been in existence for four years but has already had a disruptive impact on the taxi market. Head of Global Operations Ryan Graves explains what the company thinks about its growth and what its future plans are. The World Cup is taking place in Brazil right now and it is proving to be one of the biggest events in Twitter's history. Simon Rogers, Twitter's data editor explains why the company wants to analyse all the tweets that are being sent and what that information means to the company. Presented by Rory Cellan-Jones with studio guests Robert Scoble, the influential tech blogger and Carolina Milanesi, tech analyst from Kantar Worldpanel.