Is there a future for smart speakers?

Smart Speakers have become part of the furniture of many people's homes, but they don't seem to have proved as lucrative as the companies who created them had hoped. We explore what's next for them. We also hear from three people who say using Twitter changed their lives. Plus, has China really resolved the issue of video game addiction among young people and did you know dogs can be trained to find faults in underground electricity cables?Producers: Alasdair Keane and Ashleigh Swan(Photo: A smart speaker. Credit: Capuski/Getty Images)