Some simulators are just screenshots with hover effects. But the top ones—the ones people actually bookmark—let you:
Win13.io does not claim to be real. Instead, it asks: "What if Windows 13 launched tomorrow?" This simulator has gone viral for its "Fluid Flow" layout. The taskbar is not at the bottom; it floats on the left side of the screen as a vertical dock, similar to macOS, but with Windows widgets. windows 13 simulator top
If you are looking for a Windows 13 simulator that feels like a proof-of-concept from Microsoft’s internal hackathons, Zed13 is for you. It is open-source and available on GitHub, but you can run the live demo on their main domain. Some simulators are just screenshots with hover effects