Oh, it will replace your phone, music player, laptop, radio, television, dictation taking device and practically every other gadget you might consider carrying around.
Sounds a bit like any number of pdas and the iphone etc.
Not sure Id want to be talking to a piece of paper?
Itd be ace though. Image a world/society where everyone has some kind of indestructable wi-fi sheet with all the attachments. Durable enough to be foldable etc, and foldable so it stays phone/pda shaped in the pocket. So thats cool.
But then you get to work, and unfold it, and put it in its cradle. Wham, its your desktop monitor, with a laser keyboard. Wi-fi means all your files are accessible from the server back home.
Whilst on the train home you get it out and have a read of the paper, or watch a film, before docking it at home to charge and watch TV on it...