I saw a duo last night called "Black Violin" from Florida play hip hop music which was fun to hear. They were preceded by a youth symphony of 15 kids who were a joy.  The duo walked on stage in the middle of the kids second tune and loudly took over the tune up-staging the kids.  Clever.
They did nothing a normal violinist couldn't do, but the electronics were really good.  I'm glad I heard them, but without the drummer, I would have left early.