Totally (well nearly completely) off topic this one. I am a bit of a boing boing fan and came across a piece which if you haven't seen then its worth it.

Take a look at this flash video...

http://www.image-metrics.com/videos/331

Its hard to see what all the fuss is about until near the end. As soon as I read that Paul Devebec had a hand in this then I couldn't click fast enough. And being a presentation at SIGGRAPH should pique your interest too...

Basically, from this point onwards I defy anyone to state with conviction what is real any more. Stuff has looked real for a while but people have always eluded CGI.