It is interesting they are doing this now, but I don't know how effective it is going to be. I doubt it is going to make major websites like download.com change the way they do things either. It would be better if the warnings also explained the site uses several different download buttons to try to trick you into downloading stuff you don't want.
http://lifehacker.com/google-will-now-warn-you-about-sites-with-fake-downloa-1757046319
http://lifehacker.com/google-will-now-warn-you-about-sites-with-fake-downloa-1757046319
