Google Adsense is experimenting with the latest AD styles in 2009? !

Today I happened to find that Google seems to be experimenting with the latest advertising style, the specific situation can see the picture I cut down:

The new style has a navigation button similar to the sliding door below, click you can switch between 6 different ads, the dynamic effect is relatively cool, do not know how the actual advertising effect, Google Adsense should also be doing the experiment, I refresh the page again, see the advertising style is not this