having used the Cr48 and a 3g iPad for several months in the US and Japan, I think Apple's vision is more robust, ultimately better for me, the end user. When I'm mobile, whether I'm doing sysadmin, reading, listening to music, I can do more of it, in more locations (especially offline), with better, more reliable apps, on an iPad.

edit: reposted here from a comment on the webian group:

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I wrote this a few weeks ago, seems relevant as the mobile space heats up with WWDC announcements.

http://wherein.posterous.com/i-review-the-cr48

bottom line: don't forget about international travelers, spartan environments, and that whole, whacky "offline" idea. You want to be relevant 50 years from now on Mars, where the light speed round-trip to earth takes minutes, offline use remains fundamental.