Longhorns WinFS will make it easier to locate and work with standard data types, such as address book entries.
It looks as though Longhorns Internet Explorer will finally join the pop-up blocking party.
Longhorns sidebar will in time host interesting desktop applets—in the preview code, though, we had to settle for this flashy clock.
Windows Explorer undergoes an overhaul in Longhorn, taking on a trim look that matches a similarly reworked Internet Explorer.