The new version of iPhoto offers an array of full-screen modes for viewing events, Faces, Places, albums, and projects. You can also do all of your editing in this mode, as shown in the screenshot here.
Autoflow is now purportedly smarter, laying out your photos automatically in the order they were taken. There's also a new layout view that lets you see the entire arrangement of your book on a single screen.
There are a handful of new auto effects in iMovie. Select "instant replay" to automatically insert text over a particular scene and have it repeated in slow motion. There's also "flash and hold" and "jump and cut to beats."