I can think of only one multi-tasking use case that I would like to see, which is this:<p>While commenting on some web forum (HN, Reddit, etc) or chatting on AIM/IRC, I often find while in the middle of typing a comment that I want to look something up on the web, e.g. a fact or spelling, and then come back to finish my comment armed with whatever knowledge I just looked up.<p>The best interim solution is to copy the text of my partially-finished comment, quit the current app, open a notes app and paste the comment, quit the notes app and open web browser, look up whatever I'm looking for, quit web browser and go back to the notes app, copy the comment again, quit notes app and open up the original app and find whatever I was replying to again, paste in my comment, and finally finish typing.<p>I don't really need multi-tasking to get around this, but it might be helpful if there was a way to "freeze" the current state of an app so I could use another app for 5 minutes without the first one having to quit and lose all of my context.