Lukas Mathis on the iPhone OS 4 Task Switcher
I found this article sitting in what I call my Tumblr Postbox. I should have included it in my previous post on iPhone OS 4 Background Processing. Here's what he says:
Basically, the task switcher is a tiny version of the Springboard that shows what amounts to a random selection of your apps
[…]
Say, you’re writing an e-mail while referring to a Wikipedia article; the task switcher allows you to quickly jump between the two applications instead of having to go through the Springboard, which would take a few seconds longer.
[…]
it seems to me that the few situations where the task switcher is useful do not warrant adding an entirely new way of opening applications.
This is almost exactly what I think. The case of rapidly switching between just two applications is interesting, so I have written about it in my next post.