Musicians use something that they can HEAR is clearly different to anything else out there (and that difference is a good thing

).
Close your eyes and listen to that video. Hear anything different? I didn't. Sounded like a bunch of blokes wanking around on some synthesizers..!
If the inventors themselves can't get it to sound unique, what makes you think anyone else can..? There's a LONG history of things like this popping up at NAMM's and the like, a bit of a buzz for a while, then it's bye-bye...
http://www.buchla.com/historical/thunder/ and our own SZ has more:
http://www.synthzone.com/ctrlr.htm If the saxophone had SOUNDED like a clarinet, no amount of weirdness would have kept players playing it... but it didn't. These guys are just too into Star Wars

(wish they DID play the Cantina scene music, that might have been cool!)
BTW, I thought the arranger evolved out of home organ accompaniment concepts, not some off the wall synthesizer concept. .

A natural progression, not some giant leap forward...