Gnome 3.6 may get a new photo browser, similar to Gnome Documents. With this app, you will not only be able to view photos in your local har drive, but also will be able to view pictures from the cloud services and media shares. The app also allows quick sharing of pictures to social sites such as Facebook, Twitter, Picasa and also emailing it. One can also view photos in full screen mode and also create a slideshow.
The app can be compiled from GIT, and looks like above