Besides Gmail, Writely, Google's web-based spreadsheet, the calendars offered by both Yahoo! and Google, and the big daddy, Microsoft's rumored Web-based Office, the move is on from programs installed on individual PC hard drives to hosted applications and storage on servers somewhere out there on the Internet, maintained and upgraded automatically for you, with functionality from any Web-connected device.
Of course, we'll have to pay for it, but if prices are good, it just might be worth it. And some might be ad-supported and hence free to users. It's where computing -- and the world of work -- is headed.