Google recently added a dictionary feature to the left hand panel or menu in search results. Although I do not look up words in a dictionary that often it may be regarded as a helpful tool or feature for some users. I don't know how well sites like http://dictionary.reference.com/ will like it or if it will cut into some of their traffic or not. If you remember a while back Google maps took a big chunk out of mapquest and similar map sites. And, now they conveniently display maps and directions in search results to their own (Google Maps) instead of the competition.
Another thing Google is adding is Date Annotations to Google Images. Basically it will tell you in the lower right corner of the image how many days ago an image was uploaded. Which might be helpful in determining whether an image is more current or from an older post. So far it seems to be only recent news and events. I am assuming we will see more results with how many days ago as time goes by.
It seems Google is constantly updating and adding new features to search results. Whether it is an effort to stay ahead of the competition, or just for the heck of it I don't really know.
You can always check the Official Google Blog for what they publicly post here:
The Official Google Blog
And, more information about the dictionary feature and Google Images with date annotations here:
This week in search 4/15/11