Now we are merging Insights for Search into Google Trends, wrapping it all up in a clean new interface to give you a clearer view of what’s on the world’s mind. The new Google Trends now includes features from both products and makes it easier and more intuitive to dig into the data. We’ve updated the line chart and map using HTML5 based Google Chart Tools so you can now load the page on your mobile devices, visualize the results without scrolling, and get Hot Searches not just for the U.S., but also India, Japan, and Singapore.
So there is not that much that is new but they merged two really nice and useful tools into one. Which does make sense to me.
On Google+, Google said it can even offer predictions:
Search data can help reveal all kinds of interesting things - observations (or even predictions!) about events like the Oscars or the Super Bowl, popular Halloween costumes or holiday gifts, relative interest in political candidates or parties - you name it.