Microsoft has come up with a solution to avoid using the Metro name – call it Windows 8 and Windows 8 user interface instead of Metro UI. Very clever… I like Metro better. Unless Metro Group makes typefaces or other design elements, I don’t see a problem.
Here’s the official guidance, my sources say: Anything currently/formerly known as a "Metro-Style application" (with or without a hyphen) will now be known officially as a "Windows 8 application." References to the "Metro user interface" will now be replaced by "Windows 8 user interface." And instead of saying "Metro design," the Softies and those adhering to their official guidelines will be using the words "Windows 8 design."