[jimbobimbo]

Exactly my sentiment over at http://news.ycombinator.com/item?id=2564086:

I wonder how this might impact the overall security? Right now URL bar provides useful information about the domain where you are at. Hiding the URL box could bring back the most brain-dead attacks like hosting a phishing site on a regular HTTP (no cert = no warnings from the browser) and hidden URL cloacks the fact that the URL in fact is "bankofameri.ca".

[extension]

Certainly they will still have some way of indicating the domain, at least with SSL. It might actually make users more aware of the domain since it won't be sandwhiched between URL gibberish.