You can still type URLs into the bar.
It's easier to direct them to it because it always has the same prompt text. "Do you see a box that says 'Search Google or type URL?'? Great, type this into it..."
The thing that's harder is getting them to read the url back to you.
Once you obscure URLs, web browsers become _impossible to support_. Of course Google doesn't care, because support isn't part of their lexicon.