For all of Apple's nonsense about adding iPhone Mirroring to the EU, the new Device Hub (iOS Simulator) lets you remote-control your physical iOS devices just fine. I don't think the DMA has an opt-out for developer tools 😛
@stroughtonsmith if I were making a new iPhone that could double in width, and wanted developers to be able to test this more efficiently (and yet wanted to put this capability in the hands of developers before announcing it), this is exactly how I would do it.