OK, let&#x27;s talk about interface. The major problem such interface has to solve - is how keep the driver aware enough of the road at times he needs to(legally, at all times) , while making it more FUN for him than regular driving, otherwise, why bother ?<p>That&#x27;s why i believe entertainment in some form, is critical.<p>So maybe that siri personality is also built in such a way to enable all-time awareness by the driver, effortlessly ?<p>Or another option: maybe they use some kind of brain monitoring machine like eeg, and together with music put you in some kind of meditative state fit for driving, yet very enjoyable ? but doing so in a subtle way ?