Well, I don't know if you're being sarcastic or not, but if he does it again this year it's worth getting on a plane to see. It is awesome.
Stewart totally made it so.
And thus my geek points are used up for the day.
I'd go see it. The only thing cooler than Stewart reading a Christmas Carol would be Avery Brooks playing Othello. (Alas I can't quite afford to pop on down to DC for that.)