Google is known to hide Easter Eggs all over its website and likes to remind us of important dates and personalities' anniversaries.
Just like the PAC-MAN game they had on the front page in 2010 for its 30th anniversary, this time they're celebrating the 37th birthday of classic Atari game Breakout.
Indeed, if you search for "Atari Breakout" in Google Image Search you get greeted with this:
I think some music would help here, I got pretty bored after my third game:

