Google has announced that in the next version of the chrome web browser, they will start automatically truncating the “www” out of typed addresses in the address bar. While this may seem a trivial change to many that are already use to skipping typing the full address of a website into their web browser. For some it may turn out to be confusing as it is a visual cue that you are at the correct website.
While I doubt that this will turn into a major issue. For some it could be problematic if they confuse where they wanted to be for something else and then go retyping the now wrong address or even get tricked into going to a lookalike fake website to take advantage of this confusion.
In addition it could be a headache for webmasters that are hosted with companies that consider www.myplace.com and myplace.com as really two different domains. Google did not say if this would also affect SEO efforts made by webmasters that might still be using the www format to link back to their domains.
UPDATE 9/17/18:
Google, after a large amount of online debate has said they will delay these changes at least until ver 70 comes out. And after more input from the public.