Google rich results test
I believe that Google is simply testing out the enhanced rich results browsing experience, to make sure that it works well with the new Search results format. If you’re one of those who use Google regularly, you’ll want to make sure to take a look at the new interface. In my opinion, it looks like a great improvement over the current Search Results page, but it does have some bugs that I’m not able to test yet. Only time will tell, but I suspect that Google will quickly resolve any usability problems associated with the new interface.