IMHO, the TED clip was quite mediocre.
As I'm a regular performer, ranging from jazz, to rock to contemporary
computer music, I think the TED example does not in any way
demonstrate the real possibilities with for example PD and gestural
controllers.
OTH, at times I've been accused of having "a loud body language"...
FYI, if you've seen Keith Emerson doing Pics and an Exhibition (c.
1971) I can tell you that Emerson's Hammond-juggling was playback +
"gesture" :-)
/Mikael