I agree with your later points, but Apple themselves have demonstrated over and over that "first to mainstream market mindshare" is not important. Just because they're first on the market with Siri doesn't mean that the leader of this niche will still be Siri in two years.

And they're really not first on the market anyhow; look at the existing Android application or the first Siri iPhone app. I think Pioneer's Zypr website is pretty clear that they're relying on developers to use their API and create apps to use it for integration. This is just another open-model answer to Apple's typically closed-model approach.