edit: The Logitech Ultrathin Keyboard cover is sort of similar, but because the iPad doesn't have a kickstand, you lose keyboard real-estate to make the whole thing balance. Also, you lose the 'fold open/closed' movement. And it needs its own battery and hence another wall-wart. Also: no touchpad.
Surface (with its kickstand) + thin keyboard cover is an advance on that. You've got something that folds open and closed like a laptop, but is about the same thickness as iPad+smart cover.
Surface (with its kickstand) + thin keyboard cover is an advance on that. You've got something that folds open and closed like a laptop, but is about the same thickness as iPad+smart cover.