So, you can no longer assume being anonymous when walking down the street. If your random photo is matched with your profile, you can be basically fully identified anywhere. With all those cameras everywhere, you could be fully tracked.
Also consider that your local grocery store clerk probably knows your eating and drinking habits better than you know them yourself.
You could easily reduce the search space to match a face taken by a CCTV camera by using cell phone location data to limit it to people in the general area...
The difference from before I guess, is that it's less in your face, and can thereby happen without people noticing as easily.
Not for everybody all the time, though...