So far, listening to audiobooks and interrupting somewhere in the middle of a chapter used to be a frustrating experience - you’d just either have to start over or manually try to skip forward to where you left off. Whispersync changes all that and syncs all of your book listening to the cloud so you can continue from where you left off.
The same goes for games. Whispersync for games gives developers the opportunity to store your progress, so that you can pick from where you stopped playing. Neat, isn’t it?