Sadly, Google is tightly restricting the true ChromeOS which boasts 8 sec cold boots and web app-based use. I look forward to this becoming available for install on some of our custom-built boxes. Xi3 has released the first desktop to use ChromeOS, but the starting price of $850 (are you %#$& kidding me?) seems to price it right on out of competition. More feasible may be to adapt one of the Chromebooks from Acer or Samsung.
With an openly available SDK it should only be a matter of time before automotive apps are available.