Here's an article mentioning the iOS in the car integration coming to a lot of cars for their 2014 models. There is no mention of Infiniti rolling this out right now, which is kind of disheartening. I'd be pretty disappointed if this isn't an option in the Q50 that can be integrated soon.
Siri 'Eyes Free' Coming to 2014 Chevy Camaro, Volt, Malibu and More - Mac Rumors
Siri 'Eyes Free' Coming to 2014 Chevy Camaro, Volt, Malibu and More - Mac Rumors