For all intents and purposes QR codes are a dead technology only being kept alive by marketing machine life support. For some reason advertising types think it's easier for consumers to snap a photo of a pixelated square than remember a URL, but as Michael Ciuffo points out with his obfuscated QR code clock, it's a "…technological convenience that really isn't convenient."
Instead of using its LED display to show numbers, words, or even rotating hands, the clock displays an ever-changing QR code that requires you to snap a photo with an app on your smartphone to translate the time. As far as functionality goes the creation is completely and utterly pointless. But as commentary on why marketers are still trying to push QR codes on us, it's utterly briliant. [Ch00ftech]