Robert Love: Why the iPad and iPhone don’t Support Multitasking

"So how is Apple going to enable support for multitasking? Likely similar to how Android allows it. The Android platform was designed from the ground up for use on phones and other embedded devices. Consequently, we built in a mechanism whereby applications can save their state, including their current view, with the system. In fact, through this state saving mechanism, which we call Bundles, Android applications can operate as if they are stateless."