At the WWDC 2013 keynote, one of the major things Apple addressed was iWork for iCloud. The feature allows any iCloud user to log into iCloud.com through a Web browser on any PC or Mac to access iWork applications like Pages, Numbers, and Keynote.
The feature is currently in beta and developers were able to begin testing iWork for iCloud directly from the iCloud Web site just three days after the unveiling at WWDC 2013. Now, Apple is reportedly allowing access to iWork for iCloud for all Apple employees as indicated by this e-mail via 9to5Mac:
Originally Posted by Apple
iWork for iCloud is very feature-filled, almost just like iWork itself for the Mac or iOS, except that because it works out of a Web browser, it can run on multiple platforms including Windows. Notably, Apple never created a Windows version of iWork, so this is a big advantage for iWork users that need access to their files when a Windows computer is the only thing in range. The software will be compatible with Safari, Internet Explorer, and Google Chrome and will support Microsoft Office documents.