I think the best use of a "PAN" would be to synchronize data between devices without having to send your data halfway around the world just to update a second device that is 2-3 *feet* away from the first one. At one time, before the latest iteration of mainframe/network/cloud computing, you could synchronize data between devices over a USB cable. It worked quite effectively; in fact it worked MUCH better than the current crop of half-baked solutions. The cloud has it's place, but synchronizing between my computer and whatever device attempts to replace my PDA is not one of them.
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