Looking through pending edits, I noticed someone had stripped metro off a Java webservices app.
However, Metro is a well-known Java WS framework, as well as what the tag currently says: "Metro is the user interface design developed by Microsoft and used in recent Zune firmwares, Windows Phone 7 and Microsoft Windows 8."
What do we do when one tag clearly fits two completely different technologies? I'm actually surprised that metro wasn't already in-use for Java purposes; its existence predates Windows 8 by a number of years.
Some additional background is on Tag merge request: [metro-ui] and [metro].