Further, can today's ruling be extended to protect all digital tracking information--your phone, your tablet, your car, electronic road passes, etc.?
None of this is going to be satisfactorily resolved until the people demand data security. There is no reason for the phone companies need to retain this data for more than a couple of months after the bill has been paid, if that. But they save it anyway for years and years, probably forever. And the vast majority of their customers do not care. It will not change until the customers DO care. I hope when that happens it is not too late.
FWIW, I do not have a smart phone, and I only carry my dumb phone sporadically, and I keep it shut off unless I want to use it. Life is just fine that way.