Google Pixel 4 boasts radar

The latest handset from Google introduces a new way to control a phone without touching it. Is it actually useful, or an interesting gimmick? And the company's hardware chief Rick Osterloh tells us why he would warn a house-guest about the presence of smart devices. Plus, Nir Eyal, author of the new book "Indistractable" shares his strategies to help us all be less distracted by our gadgets. Presented by Rory Cellan-Jones, with BBC tech reporter Jane Wakefield, and special guest Charlotte Gee from the MIT Technology Review.(Image: The new Google Pixel 4 smartphone displayed during a Google launch event in New York City, Credit: REUTERS/ Eduardo Munoz).