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Admittedly I can only make guesses as to the actual implementation. It may well be through the cloud, through some Bluetooth/Wi-Fi communication, or maybe even a mixture for all we know. Nevertheless, my point is that the concepts and the high-level integration in and of themselves are not particularly novel.

Again that's not to discount what Apple has achieved here. In typical Apple fashion, their excellent execution of existing concepts is where their value proposition lies, and this is no exception.