It's a bit more complicated. Mesh predates SkyDrive (and Dropbox for that matter). It was in beta since before Vista, if I'm not mistaken. It was truly visionary product. Then something happened and it never got released properly, instead FolderShare or Live Sync came up, which was a far cry from the original vision. Mesh beta continued to exist. The Live Mesh release appeared in 2010: functionally it became closer to the original beta, but very toned down (did you know that there was an idea of "Mesh apps"?). And then SkyDrive started to gain steam and recently its app was released. This app dropped shared folder sync and remote desktop features. Mesh is and was a superset of both SkyDrive and Live Sync apps.