In Cmder / ConEmu, I was working with multiple tabs, and realized it'd be helpful to have them side-by-side. In Chrome/Firefox, I'd click a tab and drag it out of the parent window and release; it'll spawn a new window with just that tab.
I know I can detach the tab from ConEmu entirely, or spawn a new process in a new window, but I was trying to find a way to simply move an existing tab as-is to a new ConEmu window.