Maybe not of interest to everyone, but it has been sort of expected since the demise of Lemur and the rise of the iPad. Liine have released Lemur for iOS;
Given that this can pretty much control anything (music, video, lighting) in any way you like (OSC, MIDI via WiFI or CCK) then we could see some interesting applications of this in the clubs as well as studios. The neat thing is that you can access shared Lemur templates online via the Liine forum or User Library and now use them on iOS.
I'm guessing this could impact sales of Emulator too.
The app is pricey at $49.99, but more than worth it for those who couldn't afford the hardware years ago - plus it can run on iPhone/iPod Touch as well as iPads.