I think the implication is this will become trivial and trivially automated, no human investigator needed. I bet there will be plugins in one year's time to right click on a post and get a full report on who the author is.
Wouldn't it also become trivial to pretend to be another author?
agreed and the new frontier here will probably be obfuscation by creating false positives with these same tools, but that kind of renders the web unusable in my mind.