Samsung has applied to trademark the term "Activate Fan Mode" in Europe. This possible new setting applies to smartphones and tablets, thus strongly suggesting these devices will start launching with physical fans soon. This would be a particularly advanced next step in mobile-device cooling, if so.
https://www.notebookcheck.net/A-new-leak-hints-at-active-cooling-in-next-gen-Samsung-phones-and-tablets.539283.0.html