Where would you put the iPad while you are holding the wireless control? At that point, you might as well play on a desktop or notebook.
I'd buy an Apple approved controller in a heart beat.
Gamepads are typically for old games that are not optimized for touch controls
Why would you ever want your hands/fingers over the visible screen?
Yes, why on Earth would anyone want to touch a touchscreen?
It would need to be a common standard, otherwise it would end up like the old ZX Spectrum days with controllers using proprietary interface APIs.
As for the people saying you might as well play on a laptop/desktop, if I'm on the move, I'd rather just carry an iPad (with case/stand) and a controller.
MacBook Air 11" although it hasn't got the same battery life.
I see this possible upcoming gamepad controller for the iPhone
http://www.22moo.com.au/GameBone.html
It would need to be a common standard, otherwise it would end up like the old ZX Spectrum days with controllers using proprietary interface APIs.
As for the people saying you might as well play on a laptop/desktop, if I'm on the move, I'd rather just carry an iPad (with case/stand) and a controller.
The whole concept of taking something portable and self-contained and encumbering it with external controllers and devices is counter-intuitive. Sure, you can come up with all kinds of crap to make an iPad more like a (fill in blank). But then just buy (fill in blank).