Is the title of the article misleading? It makes it seem like gmail, hotmail, and aol have also had user account passwords stolen but that isn't the case.
It's the users of yahoo voice which have had their passwords stolen. If they happened to reuse those passwords for their other email accounts, then yes they're compromised. But that doesn't in any way mean the breach "extends to Gmail, Hotmail, AOL Users". The only breach so far was at Yahoo Voice.