Some of the folks at AppleTVSource found some strings pertaining to calendar and contacts syncing for the Apple TV which sounds fairly far-fetched. Maybe you can add your calendar entries on the TV? The Apple TV will inform you when you’re late? Who knows. Rumor and innuendo, friends.
Contacts and Calendar syncing coming to the Apple TV? [AppleTVSource]
Heh, wouldn’t it be nice if the iCal was so you could set a time for recording ??