I was going to mention the possibility of the camera connector. I know it's kind of hack to get USB out of the iPad for a lot of things. While I don't necessarily share your occasional Apple anger I can definitely see the possibility of that particular ability going away without a lot of notice which would obviously be a very bad thing.
I definitely share your vision for using the iPad as a remote for QLC+. I can see that as definitely be something useful. It would be especially useful if the iPad could function as a supplemental (say second or third console). Even if I didn't *need* it, I'd have a hard time not adding an iPad or two and pretending that I have a Whole Hog
Very interesting on the Android version!
I don't see usb midi control going away.. as this is a key component in Apples garageband and is part of the iOS SDK. and Midi Studio that is part of Mac OSX.