I think it would be a great idea to implement a QR code generator into Opera, because either you need an addon or you have to find a site to make a short URL to give it to one in a convenient way.
I´m thinking of one sitting at a laptop or PC browsing and the other one with smartphone or tablet wanting a link from that laptop/pc.
Example: Me browsing and chatting on phone with buddy. Want to show him something quickly. It´s just too complicated for "quickly" at the moment in Opera.
I would very much appreciate my wish come true