Well, you'd download your QR reader app there, start 'er up, point it at your QR code thingy and have the app read it, which would take you to the HF homepage.
I am quicker on the draw with just hitting my browser bookmark, but I guess for new sites, it could be good. I'm not one to stand in the way of progress (ok well maybe a little bit in the way, but willing to move), but still am unconvinced about the usefulness. Of course my iPhone is slow in starting apps, so that may factor in to my experience with it as well.
There is that gee-whiz factor I suppose.
"Civilization is the limitless multiplication of unnecessary necessities." - Mark Twain
“I go to nature to be soothed and healed, and to have my senses put in order.” - John Burroughs