Want to know how much ultraviolet exposure you’ve had on a summer’s day? Next year, a hair slide could tell you.
Need to monitor your heart’s electrical activity? A pair of headphones could do that and feed the data to your smartphone.
Both are just around the corner. For the past year or so, the main application of “wearable” technology has been for very simple tasks – measuring how many steps you’ve taken, guessing how many calories you’ve consumed doing so, and measuring your heart rate as you did so. But in 2015, we’ll be moving past that, experts say, with a panoply of products about to be launched.