Harmony OS vs Windows, Android, iOS

looks like AI generated video?

while that is a real achievement, this also sounds like "propaganda",
quite common behavior, but should not be ignored... 

Huawei’s HarmonyOS Just Declared War on Windows — Microsoft Didn’t Expect This - YouTube

Google's AI explanation

HarmonyOS differs from Windows, Android, and iOS with its distributed architecture, aiming for a unified "Super Device" experience across various devices, while Windows is primarily for PCs, and Android/iOS are mobile-first systems. HarmonyOS Next, Huawei's new version, runs on its own non-Android application ecosystem, unlike Android, which supports a massive library of apps from multiple stores, and iOS, which is exclusive to Apple's App Store. HarmonyOS is also built on a microkernel, and Windows is a traditional monolithic OS, while iOS is a custom-built system

Microsoft Reacts to Huawei’s Harmony OS - YouTube

HarmonyOS replacing Windows on Huawei laptops — delivers connectivity across the ecosystem | Tom's Hardware

Huawei’s license to use Microsoft Windows expired last March, and it’s unable to renew its contract with the software giant due to U.S. sanctions against the company. Instead, the Chinese tech giant launched HarmonyOS, its replacement for the desktop operating system from Redmond.

HarmonyOS PC Explained: How Huawei’s Desktop OS Differs from Windows - Gizmochina

HarmonyOS-Next @GitHub: nothing much... 

There is even Chinese alternative for GitHub...

The official source code for Huawei's open-source operating system is hosted on Gitee, while various HarmonyOS-related resources, samples, and community projects can be found on GitHub.

OpenHarmony: OpenHarmony是由开放原子开源基金会（OpenAtom Foundation）孵化及运营的开源项目，目标是面向全场景、全连接、全智能时代，搭建一个智能终端设备操作系统的框架和平台，促进万物互联产业的繁荣发展。

HongMeng Kernel (HarmonyOS 5.0+): Huawei's latest iterations of HarmonyOS (known as HarmonyOS NEXT or HarmonyOS 5 and later), which no longer use Android code, are built on their proprietary HongMeng microkernel. This kernel is written predominantly in C, with some Assembly language for performance-critical tasks.

OpenHarmony: The open-source base for the OS, OpenHarmony, reflects this multi-kernel approach, with its different kernel variations (Linux kernel 5.10, LiteOS-M, LiteOS-A) also primarily consisting of C and C++ code

already in some car models, including Nissan?!
China's EV Takeover: Guangzhou Show Reveals JV Brands' Desperate Fight - YouTube