Now before anyone says that this is the first virtual concert, this just needs to be said, for the benefit of those not in the know. Feel free to correct me if I'm wrong.

I do believe there were other lives with Miku, though with a large flatscreen instead of this more reality-bending concert. Even then, UK band Gorrilaz actually did something very similar to this sort of concert.
Now that that's out of the way, these virtual concerts are really neat, I have to admit. Maybe after this, Ban-Nam might have some ideas to bring their idols to life on the stage...
seriously, fund the hell out of it. I want virtual Azusa on a live stage. 8U