Google is always experimenting with new features aimed at improving the search experience.

I dont know what to say its a latest or copied from YAHOO. But I one good thing is, Google take this idea and make it more freindly and give statistic,Keyword suggestions,Keyboard shortcuts,Alternate views for search results. I would say GOOGLE ALWAYS A HEAD than any search engine.

for more information http://www.google.com/experimental/index.html

what you say ?