Re: How To Download And Install Windows Apps Using QR Codes ...
If I am not mistaken you can click the app link in the article.
But if you are on a WP device and the code is on another screen, just use the Search button to open that search thingy in WP, then click the Eye icon on the bottom there and you can scan that code like that if it's on another screen.
The QR code is for people reading for example windowscentral on a desktop and want the app on their phone. Or on a tablet.
If you've got Cortana already, the way to scan QR codes is slightly different though, as Cortana replaces your the usual Bing search that used to come up when pressing the magnifying glass button on your WP device:
Launch your camera, pull up the bottom app bar drawer and choose "photo apps". Now select Bing Vision.