Click on a photo on your Facebook wall today and you will see a new layout.
The new photo layout puts the photo in line with the text. This is most likely to encourage more engagement with the photo, either through tagging, liking or commenting.
This new layout also gives Facebook more white space to put ads. I have seen ads appearing on the bottom of the white space.
As such, this makes photos more valuable and a key engagement tool for your fans and friends.