You'd have thought, that as tired of George W. Bush most Americans had gotten by the end of his term, that any other president would have been different. Obama talked all about change. Unfortunately, he's followed in Bush's footsteps when it comes to social protection. We've seen more and more destruction of privacy rights.
I'm not a conspiracy theorist, and in fact used to be in law enforcement myself. So I can see how this ruling can serve local law enforcement.
However, let's think about this. A judge is no longer required to test why law enforcement wants your phone location data (and to ensure they have proper probably cause to obtain it). All new cell phones are now required to have e911 GPS capability (presumably so 911 operators can locate you if you are unable to verbally give your location). So in some sense, if you own a cell phone you could be tracked at all times.
Now, I'm not going to say we're all being tracked constantly. I honestly don't think the government really gives a crap at this point. However, your phone can be tracked. Look at all the add-on cell phone services that allow you to monitor your kids based on their cell phone location.
The Patriot Act started it all from a legal perspective.