Tyros4 demonstration:
http://www.youtube.com/watch?v=kDEK4zlmYLQ

In addition to the demonstration of T4's choir voices, I particularly enjoyed the demonstrator's T4 rendition of Michael Jackson's: "Earth Song".
The strange thing I noticed right off though, is that most of the audience is gray haired, looks over 60, and 'bored to tears'.

Scott