Less space than a Nomad.
Conversely, not being able to type comfortably or hold the device for more than 10 minutes without getting cramps--these are major usability issues that will affect everyone. iPad proponents seem to think people won't need to type on these things. Aren't they for casual web use? How do you write emails, blog posts, comments, usernames and passwords, URIs, google queries, tweets, IMs, etc. without typing? These tasks are trivial on regular keyboards, I'm not sure that will be the case on the iPad (I know it's not the case on my iPhone).
BTW: "Nomad" was so appropriate, being appealing to techies but not to normal people.