I don't think the 1st generation iPad is good for creating stuff, either. I find it terribly awkward to use for posting here, for example. E.g. Cut and Paste works, but there are so many finger actions required. Moving the insertion point to a particular character works, but it's a slow process that requires fine finger motion. Etc. Then you've got to poke around some more to transfer that buffer into something else.
I think that if you really want to create more than trivial amounts of work with a tablet, then you need a physical keyboard and a physical mouse-like device (I wouldn't be surprised if they eventually come with a pen for finer control of the screen.). It may be great for Tweets, but I don't do that. A 1st generation (but of course, it's not really) touchscreen works well for me a player/reader, but not so well for me when trying to get my thoughts out to others.
Can't say I agree with the "it's more open because it's not/it does more because it doesn't" school of thought, but I can see where he's coming from. I feel he's using the wrong words to express his thoughts, though. FWIW. :-)
Cheers,
Scott.
(Who is considering a MacBook Air rather than another tablet for any future "thin-and-light with great battery life" PC-ish purchases. But that's a ways off.)