It looks definitely better than most proprietary car manufacturer software out there, but now that we're talking about extending smartphones' screens and features inside cars, something more interoperable would have been appreciated. It'll probably come later, just not from Apple.
Also, putting the emphasis on voice control is great, but I'm really not sure Siri is up to the task.
If I had to express my first opinion on Carplay, it'd be "new and shiny but probably not functional enough for it to *really* work as advertised".
