Good discussion. I've been thinking about this myself lately. Funny thing is, I'm can't really think of a "unique", new genre/style that doesn't exist somewhere, somehow. Microtonal stuff and time signatures are taken care of in Eastern Europe and the Middle East. FWIW I'm a huge fan of Balkan folk music. There's a lot there that's been largely ignored by the western world.

Thinking we do need some new instrument types to spawn new genres. But what? And it would have to become popular enough over time too...

Yamaha: Motif XF8/YS200/CVP-305/CLP-130/YPG-235/PSR-295/PSS-470
Korg: Krome 61
Kurzweil: PC3
Roland: JV-1000
Casio: CT-370
Kimball Valencia/Broadway/Conn 465/WCOC Reed Organ/Allen ADC-220/Accordions