Its my understanding that face recognition is tough to crack on a mass surveilance level. People wear hats, glasses, sunglasses, scarves, etc on top of things like different hair styles, different glasses frames, etc. CCTV quality isn't good enough to identify faces and even high quality video can be tricky if you don't get enough high quality frames of the person's face looking straight at the camera.

It looks like identifying people via their gait was a bit of a research hurdle not too long ago and there are a lot of articles from around 2012 that claimed this problem has been solved. The idea was low quality CCTV footage really can't be used to identify faces, but can be used for gait analysis. I wouldn't be surprised if there was a signature gait database somewhere in use by intelligence and law enforcement services. The same way the Stasi kept a database of people's scents in jars.

Now with everyone carrying a cell phone, I imagine immediate identification is easier than ever. IMSI-catcher devices like the Stingray are trivial to implement. Phone carriers easily give up information about their customers, including GPS history, sometimes even without a warrant. License plate tracking is common as camera deployment and plate OCR is very affordable for many municipalities. Tracking via toll system RFID transponders is common as well.

Not sure who these glasses are aimed at. It looks like anti-security theater designed to get press and lighten wallets.