Confused? You will be now.
“We have Windows apps and Windows desktop applications. Windows apps are the universal ones. Desktop applications are PC only. … Windows apps run everywhere and we still continue to run Windows desktop apps on PCs.”
Apparently, that brief discussion constituted the official announcement of Microsoft’s new app terminology — no press releases for online and print news, no song-and-dance in a major presentation by Microsoft leadership. No, the company has quietly re-re-redefined “Metro apps” as “Windows apps.”
http://windowssecrets.com/top-story/changing-names-again-metro-becomes-windows/