Well, I plan on buying one at the end of my 2010 college year in preparation for university (us Canadians have got a different system up here
😀).
I've already got an iMac, an iPod touch and a hackintoshed netbook.
The hackintoshed netbook cost me $500 a little over a year ago, it runs OS X flawlessly (Dell Mini 9), and I bought it to fill a need to take notes/browse web, etc. I didn't want to shell out for a spanking new MBP, and with the iPad coming into play, I ain't getting a MBP.
I'll be using my iMac for the heavy duty computing and whatnot when I'm at my desk at home.
My iPod touch for music basically and some apps on the go when there's no need to have the iPad with me or pull it out (like on the subway, for instance, or just walking around.)
My future iPad (generation 2) will replace my low-end netbook, which has served me well, but the iPad has the potential to do so much more, and with the new SDK, some exciting awesome apps will probably come into play. Not to mention it has better battery life, screen, sound quality...I'll use the iPad when I'm not at my Mac for anything, surfing the web, playing some games, fixing up some Keynote presentations/Pages documents (using Dropbox as I do now, hopefully), watch videos in HD in bed (something my netbook can't do and the iPod touch's screen is just too small).
My iPad would be my home away from home, something I'd use instead of a full out MBP (which I don't need because of my iMac), yet something more powerful and capable than my iPod touch or netbook.
I plan on getting the 3G version with 1GB of data to be used when there's no wifi, and along with the keyboard dock for note taking in class and a VGA adaptor, it'll be great for school. Hell, if e-textbooks take off because of this, there will be no more lugging around heavy, bulky books anymore. And speaking of books, the iBooks app might make me turn to eBooks and never look back.
🙂
I hope this helped a little bit, I didn't know what more to reply except with my own situation, so maybe you can find justification in what I just wrote, but you do have much more hardware than I do, so I can see why there'd be some doubt.
🙂 