Google Top Navigation Bar is Going Through Another Update Experiment

I noticed it today, it looks like Google want to let us know that it'll never ever stop doing experiments with the user interface. I did't see the Google Navigation Bar at a glance as it could be easily noticed with black background, so what was that? here is the snapshot


The full screenshot:


Click on images to see full size

Its a good experiment and I think Google want to get rid of the old styles black navigation bar?
What do you say, did you like it?