In addition to allowing for two iPad apps to be used at the same
time, the feature is designed to allow for apps to more easily
interact, according to the sources. For example, a user may be
able to drag content, such as text, video, or images, from one app
to another. Apple is said to be developing capabilities for
developers to be able to design their apps to interact with each
other. This functionality may mean that Apple is finally ready to
enable “XPC” support in iOS, which means that developers could
design App Store apps that could share content.
Sounds cool. I’m very curious to see how you get into (and back out of) this mode, though. It’s easy to say you want to see two apps side-by-side on the iPad. It’s not easy at all to implement such a feature without losing the wonderful can’t get lost/can’t get confused about where you are or how you got there simplicity of the iPad today.