The extra bits of the URL absolutely should be hidden from the user. Whether this method and at this point in history is going to turn out well is a different story since there are still a lot of hackers that like to edits URL to work around other problems (eg fixing broken links, trying to navigate a confusing site). Nonetheless, the clear proof that it should be hidden is that you don't purposely display the URL or any other bits of computer code on your website or application. If Chrome ends up doing this, are you going to change the titles or first lines of your web pages to be the URLs? No, you're not, because almost none of your users want that.
It's not just "bits of computer code". A URL is almost exactly like an address in the physical world. In fact, the reason that it's called an "address bar", and although the browser used to actually label it "Address" but that has - unfortunately - disappeared, is because that's precisely what it is.
