Also, manufacturing such a device would use a lot less natural resources than a Dynabook would for both the display and the battery. <br><br>And it's harder to "lose" when you're wearing it. And harder for personal data to be stolen from your person or learned by "shoulder surfers" but can be easily shared virtually with anyone near or far. Like Murray suggests in "Hamlet on the Holodeck - the Future of Narrative in Cyberspace" we'll be living "in" our data soon, either constructing organized knowledge, or playing at destroying organized knowledge.
<br><br>Personally constructed data/processes can also be more redundant, accessible, shareable and take advantage of the economy of scale and the economy of repurposing unused resources when hosted, so long as you trust your hosts.
<br><br>Cheers,<br>Darius<br>