How does Photos on the iPad compare to iPhoto?
Photos acts mostly as a photo browser. You can browse through albums and—if you’re syncing with iPhoto—Events, Faces, and Places. You can peek inside any collection of photos by reverse-pinching it in the photo browser—you’ll be presented with a thumbnail overview of each image in that set. However, Photos does not offer any of the editing capabilities of iPhoto: for that, you’ll need a third-party photo-editing app.