An iPod with an USB keyboard...!?
No, I mean they could have Star Trek style language interpreters for improving communication, Scala-style presentation software so you can take your presentations in your pocket, Deluxe Paint or Wordworth type packages for creating images/documents for upload to the web or to beam to friends.
At the moment these portable devices are for the consumer and not the creator.
And how long is it going to take them to allow you to pay for goods/services with your PDA. PayPal mobile isn't the most instantaneous process ever...