Music as a natural use of multi-touch interfaces

I have been seeing a trend lately of adoption of multi-touch interfaces within music driven applications: ranging from piano playing to replacement of a traditional DJ interface.  It makes me think that there is something about music that lends itself to early adoption of the more initiative interface... I know this is deep and yet a simple concept, but there has to be something to the way music makes us feel that drives us to ditch the mouse and keyboard at first opportunity in preference for a multi-touch interaction.  I wonder if anyone has studied this?

Here are a few links to music based multi-touch applications I have seen in recent days:

• AudioTouch OS by @SethSandler
• DJ Table Concept as a senior project by Greg Kaufman