Imagine the endgame, where web apps handle all user accounts, collaboration features, sharing, and permissions through Facebook. It's not this year or next year

Imagine the endgame, where web apps handle all user accounts, collaboration features, sharing, and permissions through Facebook. It's not this year or next year, but Facebook could become the equivalent of what Microsoft Windows is on the desktop (although much less valuable, since the Web is a more anarchic environment than the desktop).