Headphones have been aiding anti-social behaviour since the invention of the Walkman in '79. But the rise of the smartphone, and with it the ubiquity of headphones, could be changing what music we listen to as producers ‘mix small’ to cater to the 41% of Americans who use them.

People prefer wearable devices that are unobtrusive, fit into daily life and existing habits, and look stylish. But even if all these boxes are ticked, do they really want to wear technology on their wrists, faces and around their necks?

Visit any gym and you’ll find a range of fitness tribes, from CrossFit fans to bodybuilders. Despite their differences, they have one common factor – a device through which to listen to tunes as they get fit. Now, wearable maker Pebble is promoting the power of music with its new Core device.

Apparently, diamonds are no longer forever. As HNWIs increasingly spend on experiences over possessions, online jewellery start-up Opulent is the latest example of the sharing economy going luxe. It’s a $100,000-a-year service that lets subscribers trade pieces in once they’re over them.