I want to see a video of somebody using Emacs really, really well. Not an instructional video, just something that shows off its raw power. I want to be dazzled.
The inspiration for this question is the following quote:
"You have to be way smart to use [Emacs] well, and it makes you incredibly powerful if you can master it. Go look over Paul Nordstrom's shoulder while he works sometime, if you don't believe me. It's a real eye-opener for someone who's used Visual Blub .NET-like IDEs their whole career."