Ruben Gomez spotted yet another Google test, this one on the mobile interface, where Google is trying out new loading effects for the mobile interface.
Here is an animated GIF of just the Google logo hiding away when you enter the query and then returning after the search results have been displayed:
Here is a video Ruben captured of many of the new effects, including the neat way images load on the screen:
Pretty cool but hard to say if this will come to the average searcher. Google is constantly testing things.
Forum discussion at Twitter.