Flying and books incite us to wonder. A computer can assist us in wondering. It can enable us to explore ideas. That's the potential of the computer and that's what Alan's Dynabook was promising.
Sure, we can rip out functionality until we have a computer that is so pretty and simple that a monkey can use it, but that's not fulfilling the promise that computers hold. That's not what Alan was talking about.
Forgive us all who dare persist contentedly with balloons
You're forgiven. (Just not tolerated well on a place like HN. :-)