Running watches are great when youre headed out for an afternoon of training, but are typically pretty useless when it comes to day-to-day activities. Garmin is looking to change that by combining two of its most popular wearables, the Forerunner 10 and vivofit, into a new device called the Forerunner 15. The device does everything youd expect from a GPS watch, such as tracking your distance, pace and calories burned during a big run, but its also meant to be worn all day.