I can't imagine this to be a 18" device. I guess it will end up being a 13" iPad that folds down to a 4.5" x 7" x 0.4" package that fits in your pocket.Riddle me this: what advantage does a foldable iPad over a dual-screen device? I get why you'd want your phone to turn into an iPad Mini for all sorts of reasons but nobody is buying one for an 18" web browser; the device practically screams 'multiple windows' at that size.