Adaptable, minimalist interface.  Incredible.  It’s hard to explain exactly what this is, but easy to explain what its seeming limitations are: none.  The sample videos on the blog-like website exhibit a few masters using this device to arrange elaborate electronic compositions.  Even more amazing is that they are doing so live.  Utterly amazing.  If I had the time to devote to incorporating this device into my life, I would!  
 

ps. A thanks to Justin, a random encounter at the Wellington, for pointing me to this one.