I have Android right now in my car (provided with the Nexus 7 tablet) and I hate it. See my 2nd post for details.
Basically I want two things that Android does not have:
1. Mature and stable, specifically built for car interface (such as Centrafuse)
2. App in app (for example running Sygic or iGO in Centrafuse, where you still see the buttons for controlling everything)
Oh and I don't think you can convince Android to use a custom DTD for MFD2 such as I explained in my previous posts. Android was never built for VGA output, and while it might work with some SDK devices (or even on my current PC) I'm guessing it will handle VGA as it handles HDMI. No signal customisation.