Google's new image search provides more display space for images and brings up a bigger version of the image. The earlier system required a lot of clicks and also go back & select an image. The new image search provides new ways to reach the image hosted site & there by increasing the click through rate. The domain name is also click-able now & there are 4 click-able targets to the source page.
Also meta data information about the image will be displayed underneath the image in search results. The new image search speeds up the user experience & also reduces the load on the website server.
From archive: January 2013 X