Chris Matyszczyk at CNET has more:
Perhaps it will catch on. Perhaps the whole world will suddenly refuse to have their own picture on a Google Profile and merely regularly switch it out for an image of a hippopotamus; a serial killer; a nasty, dead TV character; or a former Russian president.
Soon, Google's display ads will be a farce, and the company will be forced into the one foolproof method of getting people on its side: bribery. Yes, you will get a small cut of every sale made through a display ad.