Insurance companies and law enforcement companies, have tried to obtain the files stored on vehicle obdII computers for years. So far the courts have not allowed this to happen. Citing, that it would be possible to say that you are a reckless driver if you happen to have an accident at say 5 mph but your car is showing that 5 minutes earlier you were doing 100, and the opportunity for misuse is too much. This has been going on since 1996 when the OBDII standard was implemented. Considering the current political climate which favors corporate greed and fascist government tactics, look for this protection to be removed soon.
The cell phone law which you mention has been in force for some time. It was just under appeal. Though it doesn't give law enforcement the ability to look at your phone just like that. They would have to arrest you. Once arrested, they are free to do what they like without a warrant.
This doesn't mean that Jerry "moronbeam" Brown (didn't we have enough of him already ?) hasn't put a bunch of idiotic laws into effect. My favorite is the "Dream Act" which effectively gives illegal aliens $14.5 million dollars in educational funding so that we don't discriminate against them. Last I checked the state was too broke to fix the roads that are falling apart yet we have millions to give illegals. Go figure