I wouldn't like a touchscreen external display. But I would like to know if the GPS works over the external display, or if you will have to flip your phone open to see the GPS. And if that's the case, then I'm thinking how are they going to offer car mounts for a device that you will have to flip open to use the GPS?
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There were people talking about liking the idea of the outside screen being a touch-screen, but there have never been any specs, or videos made with devices having one. It is highly doubtful that this first version will have a touch screen. With the limited amount of info displayed on the outside screen, it would make more sense to have the higher-resolution inside screen be touch.
I'm curious as to how they will handle people using GPS on it as well.