It's hard to know if this will be rabidly popular among everyday users. If you just want to quickly show friends a site, why not just send the raw link through text chat? However, it might be particularly helpful for businesses. If an extra-trendy brand uses Snapcodes, it can now point you to the web (where it can make ad money) instead of hoping that you'll eventually do more than check out its Snaps. Given that Snapchat is reportedly on the cusp of becoming a publicly-traded company, it has a strong incentive to make site sharing easy.