Or (probably more Apple-like approach) make it stand-alone and interact well with iPhones and leave it open to Android support later on or maybe start by offeri

Or (probably more Apple-like approach) make it stand-alone and interact well with iPhones and leave it open to Android support later on or maybe start by offering the kind of support for android other mid-high end systems offer. So the thing is usable without a phone: GPS, music, etc. You can answer calls for any bluetooth enabled phone. Advanced functionality like siri would only work with an iPhone. This is a new market with new use-cases. Starting by making the basics work well is a good starting point. I think that what iPhone (and Android shortly after) did for phones can be done for a bunch of things, including conventional PCs. Apple is uniquely capable of targeting the high end but they are not the only ones capable here. They'll need to execute very well.