Official release announcement - https://code.visualstudio.com/updates/v1_84#_floating-editor...
Floating windows feature is available in the VS Code Insiders channel - https://code.visualstudio.com/insiders/
I agree that the ability, found in normal VS Code, to just drag out a tab and have it spawn a fully functional new window, has been sorely lacking, and it's glad to see such a seemingly trivial feature rolled out. But it's really mostly a matter of convenience, not actual functionality. Am I missing something?