There's an increasing consumer awareness of the value of their personal data - and in response, those who gather it are finding ways to emphasise the 'value exchange' while becoming more transparent about how it's used.

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?

Tapping into the wearable technology trend, Nissan has launched the Nismo smartwatch for drivers. As well as measuring the user's heart rate, temperature and other biometrics, the smartwatch keeps tracks of the car's average speed and fuel consumption.

An estimated 50 and 70 million adults in the US alone have a sleep disorder. And with problems with sleep leading to more serious health issus, there's growing interest in sleep tracking apps and devices that help people get as restful a sleep as possible.