Your question: "If you can find a need (not a want) that is best filled by iPad-style tablets, then feel free to share."
I described what I needed in a device. Needs aren't restricted to tasks. If you meant to ask for a list of tasks for which a tablet is best suited, that would be more difficult, I would have to concede. My principal uses of my tablet are eReading, remote desktop access, web browsing, e-mail/forum/blog writing. No one of these tasks is best handled by a tablet, and while one could argue that the inclusion of eReading in the list might mark it out in some eyes as the best hybrid device to cover all those tasks, that would be open to interpretation.
But this is why, when you asked for needs, I didn't focus solely on tasks. What tasks a device can perform is only half the story; how it performs them is just as important. Factors like portability, input method, battery life, startup time, efficiency of UI and so on are what for me elevate good tablets far above netbooks or any other ultraportable. My tablet performs each of the above tasks, performs them well, and in addition meets my criteria for each of the above non-task based needs. No other device does so as well.
But that is only speaking for myself; I wouldn't dream of telling you a tablet would suit your own needs more than whatever devices you currently use. I simply ask that others extend me (and the millions of other people whose requirements led them to buy a tablet) the same courtesy.