The whole concept of OS integration across devices is a complete failure for Microsoft. Calling this new thing a "new OS" sounds like a failure to fulfill what the Windows brand used to mean: support across a large range of devices. Isn't Windows already supporting multiple display? Maybe not in the "tablet" sub-OS... which is clearly not up to the standard set by the "desktop" sub-OS.

Anyway, the only thing that keeps Windows relevant even today is its classic Win32 API applications. Everything else they tried to do has always been half-baked. I'm not optimist for the future of the platform.