http://www.pcworld.com/article/228396/kill_your_browsers_address_bar_pros_and_cons.html#tk.hp_new
Kill Your Browser's Address Bar? Pros and Cons
Google Chrome and Mozilla Firefox are working on deemphasizing your browser's address bar to maximize screen space and put the focus on web apps instead of websites.
Both browser makers are looking to web app stores that offer one-click navigation to your favorite sites as a new way to interact with the web. Google also has an extra incentive to push web apps since that is the only way Google's new Chrome OS laptops due out in June would be useful.
But is pushing the URL bar into the background a good idea? Sure you get a little more screen space -- about 30 pixels in Chrome -- but you also have less control over how you navigate the Web. Is that a tradeoff you're willing to take?
Phishing Phrenzy
The downside of hiding the URL bar, however, is that it reduces your ability to know where a link is taking you.
Most of the time that may not be a problem, but this method makes it much easier for scammers to direct you to a phony site where you can be tricked into handing over your bank account or credit card information. Blindly following a link is one of the most insecure things you can do online.