Garmin's new Forerunner 35 watch has wrist-based heart rate sensors

There are few known certainties in the world, but I'm starting to believe Garmin releasing a new wearable every month is one of them. In the past four months alone we have seen the introduction of the Forerunner 735XT, the Vivomove, the Vivosmart HR+, the Approach X40 golf tracker, and the Garmin Fenix Chronos.
Today is no exception: Garmin has just announced the Forerunner 35, an update to the popular Forerunner 25 watch. The biggest differences between the previous ver