Reality Askew

Why haven’t car manufacturers made cars with a built-in HTML page yet?  I mean how cool would it be for your car to have a simple webpage where you could check it’s battery level (think Prius), turn on the AC, check system status for any errors, etc.  Heck a simple integration of a smartphone would work for this now.  These systems could even be connected to their respective manufacturers so they could “push” updates to the cars computer for improved gas mileage or to alert you to possible issues (recalls) of a vehicle.  Go a step further and they could send you the occasional coupon for a reduced service.