For me it depends on whom I'm sharing it with: someone looking to get iPad as an eReader wouldn't really care about its gaming or office apps, for example.
One of the most interesting experiences I had whilst showing a friend was scrolling through Contacts. He saw the name of a well-known musician, and tapped on the address (by accident). That opened up Maps, which immediately pinpointed where the house was. He tapped on it again, and the Maps zoomed down into Street View, showing the front of celebrity musician's house. We zoomed back out into Maps, and with a few taps obtained driving directions from our current location to said address.
My friend obtained himself an iPad shortly thereafter.