I personally prefer to write with pen and paper. However, I end up eventually transferring it to the computer for all the goodness of digital material (rewritable, linkable, searchable, backup-able, etc.) With this pen, you can have the best of both worlds... and it looks awesome!
I so wish I could get this right now.
Or one of these high tech napkins designed by Avery Holleman:
Just scribble on these foldable plastic napkins and it'll automatically be synced with the computer. Imagine kids drawing together separately but the picture being simultaneously updated in each of their napkins. Oh, and they don't need batteries.
Imagine being able to point at anything - whether it is a building, a book or a person, and immediately getting back information on what it is or store details about it. Perfect when you're lost in a new city or you're simply reading a book and want to understand new words or historical names without being forced to flip through a dictionary or visit Wikipedia on a traditional computer and browser.
When I'm at this, I'm lusting over the Nokia Morph. If you haven't seen it already, you must check out their concept video (showcasing the amount of thought they've put into this already):
It's truly amazing what the human mind can imagine. And what we can do with technology.
When I'm working on a problem, I never think about beauty, I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong. -- R. Buckminster Fuller