I know, surf the web and make a phone call at the same time...oh, wait...maybe not that one...
I know: Take a picture and show them how clear it is. Oh, maybe not that one either.
Apply the OTA update and show them how clearly focused it is now! Uh oh, still blurry.
Ummmmm, ummm...
OK, all sarcasm aside: Google Skymap is awesome, especially on a clear night when you can match what you see on the phone with the actual sky.
The Car Home and voice search with navigation kicks major A.
Even though the camera is a major disappointment, the video feature is amazing so you can dazzle them with that if there's enough light (why can't the flash work wioth the video camera????)
Have fun, but don't be a tech snob and try and show it off as better than the iPhone unless you own Verizon, Motorola and/or Google stock.