The iPad (released April 2010): surely such a concept is absolutely revolutionary!
alt text http://www.ubergizmo.com/photos/2010/1/apple-ipad//apple-ipad-05.JPG
No way Alan Kay saw that coming from the 1970's!
Imagine such a "personal, portable information manipulator"...
...
Wait? What!? The Dynabook you say?

Thought out by Alan Kay as early as 1968, and described in great details in this 1972 paper??
NOOOoooooooo....
Oh well... never mind.