The images will not just be small thumbnails but a bigger view of the image with a separate photos feed as an option. The shared links will have much more information and bigger images, the upcoming events will show in the news feeds with useful information. The sidebar will now be more like the phone's sidebar, sliding out only when you need it. The new design looks impressive and I am waiting for the rollout, to finally test it out and see how it can improve the Facebook experience.
via - Facebook