As stated above, I use my iPad 1 for my full on-the-go computing needs. Granted, I'm a writer and editor, but still, that means I'm writing plain text or HTML posts, managing a team, responding to support emails in Mail or Desk.com's web app (and 50+ a day), all from an iPad.
And while this doesn't quite count as producing, a couple weeks ago I pulled up sheet music in Safari, put my iPad on a piano's book stand, and started playing a song that a friend had mentioned only minutes before. You'd never do this with a traditional computer, but today it doesn't even seem that odd or amazing. Sure, it was "consumption": I was reading sheet music from the iPad. But if that's not intellectually stimulating and productive, I'm not quite sure what is.
And while this doesn't quite count as producing, a couple weeks ago I pulled up sheet music in Safari, put my iPad on a piano's book stand, and started playing a song that a friend had mentioned only minutes before. You'd never do this with a traditional computer, but today it doesn't even seem that odd or amazing. Sure, it was "consumption": I was reading sheet music from the iPad. But if that's not intellectually stimulating and productive, I'm not quite sure what is.