When I go on yee-olde business trip, I generally take my MacBook Air, my Droid X, and my Kindle. I could ostensibly ditch the Kindle and just read books from the phone, but the larger screen and damn-near infinite battery life (with the radio turned off) are a winning combination.

These days, I increasingly see people in meetings with an iPad rather than a "real" laptop. If an iPad did everything I needed, that would let me ditch the Kindle as well as the laptop. Very attractive. Sadly, when I'm traveling I'm often working on technical documents, so I need latex, emacs, etc., never mind a proper keyboard.