Increasingly flexible, well-fitting wearables may become more of an option in the future as the technology improves. Samsung may have this eventuality covered with a new patent that consists of a completely new kind of 2-in-1 device. It consists of a smartphone, the top of which comes off to form a smart band.
https://www.notebookcheck.net/Samsung-patents-a-phone-with-its-own-detachable-fitness-band.548019.0.html