Microsoft:

Windows 365 takes the operating system to the Microsoft Cloud, securely streaming the full Windows experience—including all your apps, data, and settings—to your personal or corporate devices. This approach creates a fully new personal computing category, specifically for the hybrid world: the Cloud PC.

And:

Windows 365 provides an instant-on boot experience that enables users to stream all their personalized applications, tools, data, and settings from the cloud across any device including your Mac, iPad, Linux device, and Android. The Windows experience is consistent, no matter the device.

And:

You can pick up right where you left off, because the state of your Cloud PC remains the same, even when you switch devices.

If any part of your workflow is Windows-based, this is huge news. Guessing this won’t be a substitute for GPU dependent gaming, but that use case aside, seems like this will solve a lot of people’s Windows needs.