Hmm. I have a PC, while I've generally used it less since I got an mbp, I still use it and feel no inclination to move completely over to apple products.

What I'm excited about having an OS designed for touch and mobile in my car is the potential for apps to change the way I interact with my vehicle. I don't believe you are locked in to one OS or another at all, because apps are being designed for android, iOS, and others. Instagram, Facebook, and a vast majority of the apps I use are available on both platforms.

What WILL decide it for me will be the design and hardware involved. For example: I chose to move to apple products because I personally prefer is external design and UX. The touch interface is just more responsive for me, and my preference for that will influence my decisions. I hope automakers like Volvo translates this over properly, and with Apple working with them on it, I feel more confident that they will.