Fitbit seems to be preparing the launch of a new smart wearable that is supposedly going to debut at IFA 2018 as the Fitbit Charge 3. The leaked images reveal a few interesting details, such as the replacement of the physical button with a touch area that could bring in the tap actions currently available for the Alta and Alta HR.
https://www.notebookcheck.net/Fitbit-Charge-3-spotted-might-arrive-at-IFA-2018.320910.0.html