Tech Tent 15: Are phones and phablets killing the tablet?

Apple, Microsoft, Facebook and Amazon released results this week, what do the numbers mean for the market?

Ed Catmull, president of animation studio Pixar, talks creativity and business and what it was like to work with Apple's Steve Jobs.

Could bubbles be the future of display screens? Scientists at Bristol University are attempting to find out.

Rory Cellan-Jones presents with studio guest Ben Wood of analysis firm CCS Insight.