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?

A conduit between cars and phones, Nissan's stylish Nismo Smartwatch has a range of utilities beyond 'ordinary' smartphone capabilities. Will it cleanly slot into the 'internet of things'?

Wearable tech startup MC10 works at the cross-section between health and technology. Partnering with Reebok, it has designed an 'invisible' head impact indicator that monitors sports players, feeding back vital data to their coaches.

With half a billion wearable devices shipping in the next few years and going straight onto wrists, shoes, glasses and lapels, soon interacting with smart cities will seem as 'normal' as checking Facebook.