The thing I like the most about events is their concrete connection to a specific date on the calendar. An event is not an event unless it is actually scheduled for a specific date. Sure an event can be moved -- but not without considerable pain and public notice.
Little things get accomplished in time for a weekly meeting, medium sized things get accomplished in time for the quarter end, and big things get accomplished in time for events. The annual sales conference, or the big annual industry trade show, are the Superbowls of business. Everything somehow ties into those dates.
As time marches relentlessly towards the date of an event, amazing people raise their level of performance to match the challenge and the most incredible things are accomplished. The next time you really want to get something accomplished -- tie it to an event.