Perhaps the most ambitious feature of EMUI 10 was , a precursor to the "Super Device" concept seen in later HarmonyOS versions.
Each theme isn’t just a background image. The window behavior, icon layouts, system sounds (optional, but recommended), and even the cursor sets match the source material. The Windows 95 theme, for instance, replicates the exact animation of the “Explorer” folder opening and the system properties dialog. emuos v10
The result is surprisingly performant. On a mid-range laptop from 2020, Doom runs at 35 FPS—identical to its original frame cap. SimCity 2000 scrolls smoothly. Even the notoriously finicky Theme Park runs without audio glitches. Perhaps the most ambitious feature of EMUI 10